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B1 noun #31 most common 12 min read

achilles

Top 31

Practice it Examples Notes & Tips achilles in 30 Seconds

Explanation achilles in your Level:

Achilles is a name from a very old story from Greece. He was a very strong soldier. He was almost impossible to hurt. But he had one weak spot on his foot, called the heel. Today, we use the name 'Achilles' to talk about a person's weak point. For example, if you are very good at English but bad at spelling, spelling is your 'Achilles heel.' It is also the name of a part of your body. It is the thick string at the back of your ankle. If you run a lot, you must be careful not to hurt your Achilles. It is a special word because it is a name and a part of the body.

Achilles was a famous hero in Greek myths. He was a great warrior who could not be defeated in battle. However, he had one small weakness: his heel. This is why we use the phrase 'Achilles' heel' to describe a small but important weakness in someone who is otherwise very strong. In biology, the 'Achilles tendon' is the part of your leg that connects your calf to your heel. It is very strong but can be injured easily. You will often hear this word in sports news when a player gets hurt. Remember to always use a capital 'A' because it is a person's name.

Achilles is a noun that refers to a legendary Greek hero, but it is most commonly used in the idiom 'Achilles' heel.' This metaphor describes a vulnerable point in an otherwise strong person or system. For a B1 learner, it is important to recognize this word in both metaphorical and physical contexts. Metaphorically, it identifies a fatal flaw. Physically, it refers to the Achilles tendon, which is crucial for movement. You might hear a business analyst say that a company's high prices are its Achilles heel, or a sports commentator mention an athlete's Achilles injury. It is a sophisticated way to discuss weaknesses.

In more advanced English, 'Achilles' serves as a cultural touchstone for the concept of the 'vulnerable giant.' While the mythological figure represents the pinnacle of martial prowess, his name is inextricably linked to his singular downfall. At the B2 level, you should be able to use 'Achilles' heel' to describe complex situations, such as a political candidate's past or a structural flaw in an economy. Additionally, you should be aware of the adjective 'Achillean,' which describes something of great strength or heroic proportions. The term is frequently used in journalism to add a layer of classical allusion to modern critiques, suggesting that even the mightiest entities have a breaking point.

For C1 learners, 'Achilles' is not just a vocabulary word but a rhetorical tool. It invokes the 'Achilles-Patroclus' dynamic in literary analysis or the 'Achillean rage' as a specific type of destructive pride. In professional discourse, identifying an 'Achilles' heel' demonstrates an ability to synthesize mythological archetypes with contemporary problem-solving. You should also be familiar with the medical nuances of the Achilles tendon, including the mechanisms of rupture and the lengthy rehabilitation process, as this is a common topic in health and fitness reporting. The word functions as a bridge between the humanities and the sciences, requiring a nuanced understanding of its various registers.

At the C2 level, 'Achilles' is understood as a symbol of the inherent fragility of the human condition. It is used to discuss the 'Achilles paradox' in philosophy or the 'Achilles complex' in psychoanalysis. The word carries a heavy weight of tragic inevitability. A C2 speaker might use the term to critique the hubris of modern technological advancements, suggesting that every 'invincible' system contains an 'Achilles' heel' by virtue of its own complexity. Mastery of this term involves recognizing its use in high-level literature, medical journals, and philosophical treatises, where it serves as a shorthand for the intersection of supreme power and absolute vulnerability.

Practice it Examples Notes & Tips

achilles in 30 Seconds

Achilles is a legendary Greek hero known for his immense strength and his one fatal vulnerability: his heel, which led to his death.
The phrase 'Achilles' heel' is a common idiom used to describe a specific, significant weakness in an otherwise strong or successful person or entity.
In anatomy, the Achilles tendon is the thick cord at the back of the ankle that connects the calf muscles to the heel bone.
The word is always capitalized when referring to the person or the metaphor, and it is frequently used in sports, business, and literature.

The word Achilles primarily functions as a proper noun referring to the greatest warrior of the Greek army during the Trojan War. However, in modern English, its usage has transcended ancient mythology to become a powerful metaphor for vulnerability. When we talk about an 'Achilles' heel,' we are describing a specific, often small, weakness in something or someone that is otherwise incredibly strong, successful, or invincible. This concept is essential for B1 learners because it appears frequently in news, sports, business, and literature. Understanding Achilles requires a dual grasp of his mythological origins and his anatomical namesake, the Achilles tendon.

Mythological Origin: Achilles was the son of the nymph Thetis and King Peleus. To make him immortal, his mother dipped him into the River Styx, but she held him by his heel, leaving that one spot dry and vulnerable. He was eventually killed by an arrow to that very heel.

The tech giant seemed unstoppable, but its lack of data privacy measures proved to be its Achilles heel.

In a professional context, you might hear a manager say, 'Our marketing is great, but our slow shipping is our Achilles heel.' This implies that while the company excels in many areas, this one flaw could lead to their downfall. In sports, the term is literal; the Achilles tendon is the thick cord of tissue that connects the calf muscles to the heel bone. A rupture here is a devastating injury for athletes. Thus, the word carries weight both as a symbolic warning and a physical reality. It is a word that bridges the gap between ancient storytelling and modern structural analysis.

Anatomical Context: The Achilles tendon is the strongest and thickest tendon in the human body. It allows us to push off the ground when walking, running, or jumping, making it vital for any physical movement.

Even the most brilliant scholars have an Achilles heel, such as a struggle with basic organization.

Furthermore, the word evokes the idea of 'Achillean' qualities—immense strength, courage, and perhaps a touch of arrogance or 'hubris.' When a person is described as having an Achilles-like presence, they are seen as a dominant force. However, the shadow of the heel always follows. This duality makes the word incredibly versatile. You will find it in psychological discussions regarding 'Achilles complexes,' where individuals overcompensate for perceived weaknesses with displays of excessive power. It is not just a name; it is a framework for understanding human limitation amidst greatness.

Modern Metaphor: Used to identify a single point of failure in a complex system, such as a security flaw in a software program or a specific player's lack of defensive skills in a team.

The athlete's Achilles injury sidelined him for the entire season, ending his hopes for a gold medal.

The fortress was impregnable from all sides, but the secret tunnel was its Achilles heel.

During the debate, the politician's past scandals proved to be his Achilles heel.

Using the word Achilles correctly requires an understanding of its grammatical role as a proper noun that often acts as a modifier. Most commonly, you will use it in the fixed phrase 'Achilles' heel.' In this structure, 'Achilles' is possessive. You can say 'his Achilles' heel' or 'the company's Achilles' heel.' It is important to note that even though Achilles is a person, the phrase is so common that it is treated as a single idiomatic unit. When using it to describe the tendon, it is usually 'the Achilles tendon' or simply 'his Achilles' in a sports context (e.g., 'He tore his Achilles').

The Possessive Form: Because the name ends in 's', you can write Achilles' or Achilles's. The version with just the apostrophe is more common in classical contexts, but both are grammatically sound.

The detective realized that the criminal's vanity was his Achilles heel.

When writing about the mythological figure, use 'Achilles' as the subject of the sentence. For example: 'Achilles was known for his swiftness and his rage.' If you are using it in a medical or athletic sense, it often follows verbs like 'tear,' 'strain,' 'rupture,' or 'injure.' For instance, 'The basketball player spent six months recovering after he ruptured his Achilles.' Notice that in this context, we often drop the word 'tendon' because the meaning is understood. This is a common shorthand in English-speaking sports media.

Abstract vs. Concrete: Use 'Achilles' heel' for abstract weaknesses (emotions, strategies, flaws) and 'Achilles tendon' for concrete, physical body parts.

Despite his immense wealth, his lack of true friends remained his Achilles heel.

In academic writing, you might use 'Achillean' as an adjective to describe a hero or a conflict. 'The Achillean struggle between duty and personal glory is a central theme of the Iliad.' This elevates the register of your writing. For B1 learners, sticking to 'Achilles' heel' is the most practical application. It is a 'show-off' phrase that demonstrates a good grasp of English idioms. Always ensure the context supports the idea of a 'fatal' or 'significant' flaw, rather than a minor inconvenience.

Sentence Patterns: [Subject] + [Verb] + [Possessive] + Achilles' heel. Example: 'Spelling was always my Achilles' heel in school.'

If we don't fix this software bug, it will become our Achilles heel during the product launch.

The army was powerful, but their long supply lines were their Achilles heel.

He is a great chef, but his Achilles heel is his inability to manage time.

You will encounter Achilles in three primary domains: sports news, business analysis, and literary discussions. In the world of sports, especially football (soccer), basketball, and track and field, the 'Achilles' is a dreaded term. Commentators often speak with gravity when an athlete goes down clutching the back of their ankle. You might hear, 'It looks like a non-contact Achilles injury, which is never a good sign.' This refers to the physical tendon. Because it takes a long time to heal, the word is associated with career-threatening setbacks.

In Sports Media: Journalists use 'Achilles' to describe the tendon injury specifically. 'The star quarterback is out for the season with a torn Achilles.'

The commentator noted that the defender's lack of speed was his Achilles heel against fast strikers.

In business and politics, the metaphorical 'Achilles' heel' is a staple of analytical writing. Financial analysts might point to a company's heavy debt as its Achilles heel, even if the company is currently profitable. In political debates, an opponent's voting record or a specific controversial stance is often labeled their Achilles heel. It is a sophisticated way of saying 'this is how they can be defeated.' Hearing this word in a meeting or a news report signals that the speaker is moving from general praise to a critical, targeted observation.

In Business Strategy: Used during SWOT (Strengths, Weaknesses, Opportunities, Threats) analyses to identify the most critical weakness that could jeopardize the entire project.

The documentary explored how the CEO's ego became the company's Achilles heel.

Finally, in educational settings, especially history or literature classes, Achilles is discussed as a central figure of the Trojan War. Students learn about the 'Rage of Achilles' which opens Homer's Iliad. Here, the word represents more than just a heel; it represents the complexity of human emotion, pride, and mortality. Whether you are reading a classic text or watching a modern retelling like the movie 'Troy,' the name Achilles is synonymous with the peak of human capability and the inevitability of human weakness. It is a word that reminds us that no one is truly perfect.

In Literature: References to Achilles often highlight the theme of 'mortality.' Despite his near-godlike status, he was still human and could be killed.

The professor explained that Achilles chose a short, glorious life over a long, forgotten one.

Every superhero has an Achilles heel, like Superman and Kryptonite.

The hacker found the server's Achilles heel in an outdated plugin.

One of the most frequent mistakes learners make with Achilles is spelling. It is common to see 'Achilles' spelled with one 'l' or with the 'i' and 'e' swapped. Remember: A-C-H-I-L-L-E-S. Another common error is failing to capitalize the word. Because it is a proper name from mythology, it should always start with a capital 'A,' even when used metaphorically as an 'Achilles' heel.' Writing 'achilles heel' in a formal essay or business report is considered a stylistic error that can detract from the professionalism of your writing.

Spelling and Capitalization: Incorrect: achilles heel, Achiles heel. Correct: Achilles' heel. Always capitalize the 'A' and include the double 'l'.

He forgot to capitalize Achilles in his history paper and lost points.

A conceptual mistake is using 'Achilles' heel' to describe a general weakness or a minor problem. For example, saying 'My Achilles' heel is that I sometimes forget my keys' is usually an exaggeration. An Achilles' heel should be a *fatal* or *significant* flaw in something that is otherwise very strong. If a person is generally weak or failing in many areas, they don't have an Achilles' heel; they just have many weaknesses. The power of the metaphor lies in the contrast between the hero's near-invincibility and his one vulnerable spot. Use it sparingly to maintain its impact.

Misuse of the Metaphor: Don't use it for small, everyday mistakes. Use it for a 'make-or-break' vulnerability in a person's character or a system's design.

Calling a minor typo an Achilles heel is a common overstatement.

Finally, be careful not to confuse the mythological figure with the anatomical tendon in contexts where clarity is needed. While they share a name, 'Achilles' alone usually refers to the person, while 'the Achilles' or 'the Achilles tendon' refers to the body part. In medical writing, always use the full term 'Achilles tendon' to avoid ambiguity. In casual sports talk, 'his Achilles' is fine. Mixing these up in a formal medical report would be a significant error. Understanding these nuances ensures that you use the word with the precision of a native speaker.

Anatomical vs. Mythological: Context is key. If you are at a gym, you are likely talking about the tendon. If you are in a literature class, you are talking about the hero.

The doctor explained that the Achilles tendon is prone to injury in middle-aged runners.

Many people mistakenly think Achilles was a god; he was actually a demigod.

The student wrote 'Achilles's' which is correct, but 'Achilles'' is often preferred in British English.

While Achilles' heel is a unique and evocative idiom, there are several synonyms and alternatives you can use depending on the context and the level of formality you wish to achieve. The most direct synonym is 'vulnerability.' This is a neutral, versatile word that can be used in almost any situation. However, it lacks the 'near-invincible' connotation of Achilles. If you want to emphasize that a weakness is hidden or unexpected, you might use the phrase 'a chink in the armor.' This also comes from a combat context and implies a small opening in a defensive system.

Comparison: Achilles' Heel vs. Chink in the Armor: An 'Achilles' heel' is an inherent, often physical or character-based weakness. A 'chink in the armor' is more often a flaw in a defensive strategy or a temporary lapse in protection.

The rival company looked for a chink in the market leader's armor, eventually finding it in their poor customer service, much like an Achilles heel.

Another alternative is 'weak point' or 'weak link.' These are simpler and more common in everyday conversation. 'Weak link' is particularly useful when describing a team or a chain of events (e.g., 'He is the weak link in our department'). For a more formal or literary tone, you might use 'fatal flaw' or 'hamartia.' 'Fatal flaw' is often used in drama and literature to describe the specific trait that leads to a hero's downfall, such as pride or jealousy. This is very close to the mythological meaning of Achilles' story.

Comparison: Achilles' Heel vs. Fatal Flaw: A 'fatal flaw' is usually internal (a character trait), whereas an 'Achilles' heel' can be internal or external (a physical spot, a specific business department, etc.).

The software's Achilles heel was its high memory usage, a vulnerability that competitors exploited.

In technical or scientific contexts, you might use 'single point of failure' (SPOF). This is a common term in engineering and computing to describe a part of a system that, if it fails, will stop the entire system from working. This is the modern, technical equivalent of an Achilles' heel. By choosing the right word—whether it's the mythological 'Achilles,' the metaphorical 'chink in the armor,' or the technical 'single point of failure'—you can tailor your message to your audience and show a high level of English proficiency.

Comparison: Achilles' Heel vs. Single Point of Failure: Use 'Achilles' heel' for people and organizations; use 'single point of failure' for machines, networks, and logistics.

The bridge's central cable was its Achilles heel, acting as a single point of failure.

His inability to delegate was the manager's Achilles heel.

The team was perfect, but their goalie's nerves were their Achilles heel.

How Formal Is It?

Fun Fact

The term 'Achilles' heel' didn't actually appear in English until the early 19th century, thousands of years after the myth was first told.

Pronunciation Guide

UK /əˈkɪliːz/

US /əˈkɪliːz/

Second syllable (a-KIL-lees)

Rhymes With

knees trees please freeze degrees disease expertise guarantees

Common Errors

Pronouncing the 'ch' like 'church' instead of 'k'.
Stressing the first syllable instead of the second.
Forgetting the 'z' sound at the end.
Pronouncing it as 'Ach-ill-es' with three distinct short syllables.
Confusing it with the word 'arch' (as in arch-enemy).

Difficulty Rating

Reading 3/5

Easy to recognize in context, but requires knowledge of the idiom.

Writing 4/5

Spelling and the use of the apostrophe can be tricky.

Speaking 3/5

Pronunciation is straightforward once the 'k' sound is learned.

Listening 3/5

Common in sports and news, so it is heard frequently.

What to Learn Next

Prerequisites

heel weakness hero myth tendon

Learn Next

vulnerability invincible hubris archetype liability

Advanced

hamartia tragic hero viscoelastic tendinopathy allusion

Grammar to Know

Possessives of names ending in 's'

Achilles' heel or Achilles's heel.

Capitalization of proper adjectives

Achillean strength.

Zero article with names

Achilles was a warrior (not 'The Achilles was a warrior').

Definite article with body parts

The Achilles tendon.

Using 'as...as' for comparisons

He is as strong as Achilles.

Examples by Level

Achilles was a very strong man.

Achille était un homme très fort.

Proper noun, always capitalized.

He had a weak heel.

Il avait un talon faible.

Simple adjective-noun structure.

My Achilles heel is math.

Mon point faible est les mathématiques.

Metaphorical use in a simple sentence.

The doctor looks at his Achilles.

Le médecin regarde son tendon d'Achille.

Refers to the tendon.

Achilles lived a long time ago.

Achille a vécu il y a longtemps.

Past tense verb.

Is your Achilles okay?

Est-ce que ton tendon d'Achille va bien ?

Interrogative sentence.

He is as strong as Achilles.

Il est aussi fort qu'Achille.

Comparative structure.

The story of Achilles is famous.

L'histoire d'Achille est célèbre.

Possessive 'of' construction.

The runner hurt his Achilles tendon during the race.

Le coureur s'est blessé au tendon d'Achille pendant la course.

Compound noun 'Achilles tendon'.

Spelling is my Achilles' heel in English class.

L'orthographe est mon talon d'Achille en cours d'anglais.

Possessive form with apostrophe.

Achilles was a hero in the Trojan War.

Achille était un héros de la guerre de Troie.

Historical context.

You need to stretch your Achilles before you run.

Tu dois étirer ton tendon d'Achille avant de courir.

Imperative verb 'stretch'.

The movie about Achilles was very exciting.

Le film sur Achille était très excitant.

Prepositional phrase 'about Achilles'.

His only Achilles' heel was his bad temper.

Son seul talon d'Achille était son mauvais caractère.

Abstract use of the idiom.

The statue of Achilles is in the museum.

La statue d'Achille est au musée.

Noun phrase.

She studied the myth of Achilles in school.

Elle a étudié le mythe d'Achille à l'école.

Past tense 'studied'.

The company's reliance on one supplier is its Achilles' heel.

La dépendance de l'entreprise envers un seul fournisseur est son talon d'Achille.

Possessive 'company's' modifying the idiom.

He underwent surgery to repair a ruptured Achilles.

Il a subi une intervention chirurgicale pour réparer une rupture du tendon d'Achille.

Medical terminology 'ruptured Achilles'.

Despite his bravery, Achilles had a very short life.

Malgré sa bravoure, Achille a eu une vie très courte.

Concessive clause starting with 'Despite'.

The team's poor defense proved to be their Achilles' heel.

La mauvaise défense de l'équipe s'est avérée être leur talon d'Achille.

Linking verb 'proved to be'.

In the story, an arrow hit Achilles in his only weak spot.

Dans l'histoire, une flèche a frappé Achille à son seul point faible.

Prepositional phrase 'in his only weak spot'.

The politician's lack of experience was his Achilles' heel.

Le manque d'expérience du politicien était son talon d'Achille.

Abstract noun 'lack of experience'.

You should warm up to avoid an Achilles injury.

Tu devrais t'échauffer pour éviter une blessure au tendon d'Achille.

Modal verb 'should' for advice.

The legend of Achilles teaches us that everyone has a weakness.

La légende d'Achille nous enseigne que tout le monde a une faiblesse.

Complex sentence with a 'that' clause.

The structural integrity of the bridge was compromised by its Achilles' heel: the rusted bolts.

L'intégrité structurelle du pont a été compromise par son talon d'Achille : les boulons rouillés.

Passive voice 'was compromised'.

The athlete's career was jeopardized by a recurring Achilles problem.

La carrière de l'athlète a été mise en péril par un problème récurrent au tendon d'Achille.

Adjective 'recurring' modifying 'Achilles problem'.

Homer portrays Achilles as a man torn between glory and a long life.

Homère dépeint Achille comme un homme déchiré entre la gloire et une longue vie.

Verb 'portrays' followed by 'as'.

The software's Achilles' heel is its vulnerability to phishing attacks.

Le talon d'Achille du logiciel est sa vulnérabilité aux attaques de phishing.

Possessive 'software's'.

Identifying your Achilles' heel is the first step toward self-improvement.

Identifier votre talon d'Achille est la première étape vers l'amélioration de soi.

Gerund 'Identifying' as the subject.

The empire's vast size eventually became its Achilles' heel.

La vaste taille de l'empire est finalement devenue son talon d'Achille.

Adverb 'eventually' modifying 'became'.

Achilles' wrath is the central theme of the epic poem, the Iliad.

La colère d'Achille est le thème central du poème épique, l'Iliade.

Appositive phrase 'the Iliad'.

The doctor recommended physical therapy for the strained Achilles.

Le médecin a recommandé de la physiothérapie pour le tendon d'Achille foulé.

Past participle 'strained' used as an adjective.

The candidate's inability to connect with rural voters proved to be his Achilles' heel during the election.

L'incapacité du candidat à établir un lien avec les électeurs ruraux s'est avérée être son talon d'Achille pendant l'élection.

Infinitive phrase 'to connect with rural voters'.

A complete rupture of the Achilles requires surgical intervention and months of rehabilitation.

Une rupture complète du tendon d'Achille nécessite une intervention chirurgicale et des mois de rééducation.

Formal medical register.

The tragic irony of Achilles is that his greatest strength was overshadowed by his singular vulnerability.

L'ironie tragique d'Achille est que sa plus grande force était éclipsée par sa vulnérabilité singulière.

Noun clause 'that his greatest strength...'.

The financial system's Achilles' heel was the lack of oversight in the derivatives market.

Le talon d'Achille du système financier était le manque de surveillance sur le marché des produits dérivés.

Complex noun phrase 'lack of oversight in the derivatives market'.

In literary criticism, the 'Achilles complex' refers to a pathological need for invincibility.

En critique littéraire, le « complexe d'Achille » fait référence à un besoin pathologique d'invincibilité.

Term in quotation marks used as a specific concept.

The army's logistical tail was its Achilles' heel, making it susceptible to guerrilla tactics.

L'arrière-garde logistique de l'armée était son talon d'Achille, la rendant vulnérable aux tactiques de guérilla.

Participial phrase 'making it susceptible...'.

Achilles' choice of a short, glorious life over a long, obscure one is a classic existential dilemma.

Le choix d'Achille d'une vie courte et glorieuse plutôt qu'une vie longue et obscure est un dilemme existentiel classique.

Prepositional phrase 'over a long, obscure one'.

The surgeon meticulously reattached the ends of the torn Achilles.

Le chirurgien a méticuleusement rattaché les extrémités du tendon d'Achille déchiré.

Adverb 'meticulously' modifying 'reattached'.

The inherent hubris of the protagonist serves as his Achilles' heel, precipitating his inevitable downfall.

L'orgueil inhérent du protagoniste sert de talon d'Achille, précipitant sa chute inévitable.

Advanced vocabulary: hubris, precipitating, downfall.

The Achilles tendon's viscoelastic properties are essential for efficient energy storage during locomotion.

Les propriétés viscoélastiques du tendon d'Achille sont essentielles pour un stockage efficace de l'énergie pendant la locomotion.

Technical scientific register.

The treaty's Achilles' heel lay in its failure to address the underlying ethnic tensions in the region.

Le talon d'Achille du traité résidait dans son incapacité à aborder les tensions ethniques sous-jacentes dans la région.

Metaphorical use in geopolitical analysis.

Achilles remains the archetypal warrior, embodying the paradox of divine power and mortal frailty.

Achille reste le guerrier archétypal, incarnant le paradoxe de la puissance divine et de la fragilité mortelle.

Present participle 'embodying' used for description.

The encryption algorithm, while robust, possessed an Achilles' heel in its key generation process.

L'algorithme de chiffrement, bien que robuste, possédait un talon d'Achille dans son processus de génération de clés.

Concessive phrase 'while robust' set off by commas.

The rehabilitation of a chronic Achilles tendinopathy requires a multifaceted approach involving eccentric loading.

La rééducation d'une tendinopathie chronique d'Achille nécessite une approche multidimensionnelle impliquant une charge excentrique.

Highly specialized medical terminology.

The poet explores the 'Achillean' theme of individual honor versus collective duty.

Le poète explore le thème « achilléen » de l'honneur individuel par rapport au devoir collectif.

Adjectival form 'Achillean'.

The project's Achilles' heel was the lack of a coherent exit strategy, which eventually led to its abandonment.

Le talon d'Achille du projet était le manque d'une stratégie de sortie cohérente, ce qui a finalement conduit à son abandon.

Relative clause 'which eventually led to...'.

Common Collocations

Achilles' heel

Achilles tendon

ruptured Achilles

Achilles injury

Achilles' wrath

Achilles' shield

stretch the Achilles

Achilles' choice

Achillean effort

Achilles complex

Common Phrases

to be one's Achilles' heel

— To be the specific weakness that could cause someone's failure.

Math has always been my Achilles' heel.

Achilles' heel of the company

— The main vulnerability of a business organization.

Customer service is the Achilles' heel of the company.

a torn Achilles

— A common way to describe a serious injury to the ankle tendon.

He's walking on crutches because of a torn Achilles.

the rage of Achilles

— A reference to the intense anger of the Greek hero.

The movie captured the rage of Achilles perfectly.

Achilles' heel in the argument

— A logical flaw in a person's reasoning.

The lack of evidence was the Achilles' heel in his argument.

to find an Achilles' heel

— To discover a way to defeat or hurt a strong opponent.

The hackers found an Achilles' heel in the bank's security.

Achilles' heel of the system

— A critical failure point in a technical setup.

The power supply is the Achilles' heel of the entire system.

like Achilles in his tent

— Refers to someone who refuses to help because they are sulking or angry.

He stayed in his office like Achilles in his tent after the meeting.

an Achilles-like figure

— Someone who is incredibly talented but has a major flaw.

The fallen CEO was an Achilles-like figure in the industry.

to protect one's Achilles

— To guard one's most vulnerable spot.

The boxer worked hard to protect his Achilles during the fight.

Often Confused With

achilles vs Arch

Some learners confuse 'Achilles' with 'Arch' because they both relate to the foot, but the arch is the middle part, not the heel.

achilles vs Hercules

Both are Greek heroes, but Hercules is known for his twelve labors, while Achilles is known for his heel.

achilles vs Tendon

While the Achilles is a tendon, not all tendons are the Achilles.

Idioms & Expressions

"Achilles' heel"

— A small but fatal weakness in an otherwise strong person or thing.

His arrogance was his Achilles' heel.

common

"Chink in the armor"

— A minor but very important weakness or flaw.

The scandal was the first chink in the politician's armor.

idiomatic

"Fatal flaw"

— A character trait that leads to the downfall of a hero.

In many tragedies, the hero's fatal flaw is pride.

literary

"Weak link in the chain"

— The most vulnerable part of a group or process.

We need to train the new staff; they are the weak link in the chain.

informal

"Heel of Achilles"

— An alternative way to say Achilles' heel, though less common.

The heel of Achilles for this project is the budget.

formal

"Soft spot"

— A sentimental weakness for something or someone.

He has a soft spot for stray dogs.

informal

"Glass jaw"

— A vulnerability to being easily defeated, especially in sports.

The boxer has a glass jaw and can't take a punch.

slang

"Feet of clay"

— A fundamental flaw in a person who is otherwise greatly admired.

The public was shocked to find their idol had feet of clay.

literary

"Sore point"

— A subject that makes someone feel angry or upset.

Don't mention his old job; it's a sore point.

informal

"Loose cannon"

— An unpredictable person who may cause damage to their own side.

The new manager is a loose cannon and might be our Achilles' heel.

informal

Easily Confused

achilles vs Achilles

Proper noun vs. anatomical part.

One is a person, the other is a tendon. Use 'the' with the tendon.

Achilles was a hero; he hurt his Achilles tendon.

achilles vs Heel

The idiom uses 'heel,' but the body part is a 'tendon.'

The 'heel' is the bone/area; the 'Achilles' is the cord above it.

He has a blister on his heel and a pain in his Achilles.

achilles vs Vulnerability

They mean the same thing.

Achilles' heel is more specific and idiomatic; vulnerability is general.

His Achilles' heel is his ego.

achilles vs Flaw

Similar meaning.

A flaw can be anything; an Achilles' heel is a *critical* flaw in a *strong* thing.

The diamond has a flaw, but the company's Achilles' heel is its CEO.

achilles vs Weakness

General vs. specific.

Weakness is any lack of strength; Achilles' heel is a specific point of failure.

I have many weaknesses, but my Achilles' heel is my family.

Sentence Patterns

Achilles was [adjective].

Achilles was strong.

[Something] is my Achilles' heel.

Pizza is my Achilles' heel.

The [Noun]'s Achilles' heel is [Noun].

The team's Achilles' heel is their defense.

Despite [Noun], [Noun] remained his Achilles' heel.

Despite his wealth, greed remained his Achilles' heel.

To identify [Noun] as an Achilles' heel.

Analysts identified the debt as the company's Achilles' heel.

The [Adjective] nature of [Noun] serves as an Achilles' heel.

The complex nature of the code serves as its Achilles' heel.

He [Verb] his Achilles tendon.

He injured his Achilles tendon.

A [Adjective] Achilles injury.

A career-ending Achilles injury.

Word Family

Nouns

Achilles (the person)

Achilles' heel (the idiom)

Achilles tendon (the body part)

Adjectives

Achillean (heroic or strong)

Thetis

Iliad

Trojan

heel

tendon

How to Use It

frequency

Common in journalism, sports, and literature.

Common Mistakes

achilles heel → Achilles' heel
You must capitalize the name and use a possessive apostrophe.
He hurt his archilles. → He hurt his Achilles.
There is no 'r' after the 'a'. It is Achilles, not Archilles.
My Achilles heel is that I'm hungry. → I'm hungry.
Hunger is a temporary state, not a fatal flaw. Use the idiom for permanent weaknesses.
The Achilles's tendon → The Achilles tendon
When referring to the body part, we usually don't use the possessive 's'.
Pronouncing it 'Atch-ill-ees' → Pronouncing it 'Uh-kill-eez'
The 'ch' is a 'k' sound, not a 'ch' sound.

Tips

The Heel Deal

Remember: Achilles = A Kill Heel. He was killed because of his heel. This helps you remember the myth and the idiom.

Don't Overuse It

Only use 'Achilles' heel' for significant weaknesses. If you use it for every small mistake, it loses its power.

The Double L

Think of the two 'l's in Achilles as the two legs he used to run so fast before he was shot.

Apostrophe Placement

In 'Achilles' heel,' the apostrophe usually goes after the 's' because the name already ends in 's'.

Sports vs. Myth

If you hear 'Achilles' on ESPN, it's a tendon. If you hear it in a history class, it's a hero.

Adjective Form

Use 'Achillean' to describe a task that requires immense strength, like 'an Achillean effort.'

The 'K' Sound

Practice saying 'A-kill-eez' to make sure you don't use the 'ch' sound from 'cheese'.

Capital A

Always capitalize the 'A' in Achilles, even if you are talking about a computer bug.

Key Verbs

Listen for 'rupture,' 'tear,' and 'strain'—these are the most common verbs used with the physical Achilles.

The Iliad

Knowing that Achilles is the star of the 'Iliad' will help you understand many literary references.

Memorize It

Mnemonic

Think of 'A-Kill-Heel'—Achilles was killed by a shot to the heel.

Visual Association

Imagine a giant metal robot that is perfect everywhere except for one tiny, rusty screw on its foot.

Word Web

Hero Myth Heel Weakness Tendon Warrior Vulnerable Flaw

Challenge

Try to identify the 'Achilles' heel' of your favorite movie character and write a sentence about it.

Word Origin

Derived from the Greek name 'Akhilleus.' In Greek mythology, he was the hero of the Iliad.

Original meaning: The name's origin is debated, but some suggest it means 'grief of the people' (akhos + laos).

Ancient Greek

Cultural Context

No specific sensitivities, but be aware that it is a Western-centric mythological reference.

The phrase is very common in American and British sports commentary and political journalism.

The Iliad by Homer The movie 'Troy' (2004) The song 'Achilles Come Down' by Gang of Youths

Practice in Real Life

Real-World Contexts

Sports Injury

ruptured Achilles
Achilles surgery
Achilles rehabilitation
sore Achilles

Business Strategy

strategic Achilles' heel
market vulnerability
competitive weakness
point of failure

Mythology Class

hero of the Iliad
Trojan War
Thetis and Peleus
Achillean rage

Personal Growth

my Achilles' heel
identifying weaknesses
overcoming flaws
character vulnerability

Cybersecurity

security Achilles' heel
system vulnerability
encryption flaw
hacker's target

Conversation Starters

"What would you say is your Achilles' heel when it comes to learning a new language?"

"Do you think every successful company has an Achilles' heel that could eventually lead to its failure?"

"Have you ever seen a movie or read a book where the hero's Achilles' heel was very surprising?"

"In professional sports, do you think an Achilles injury is the worst thing that can happen to an athlete?"

"If you were a superhero, what would your Achilles' heel be?"

Journal Prompts

Reflect on a time when a small weakness (an Achilles' heel) caused a big problem for you. How did you handle it?

Describe a famous person you admire. What do you think is their Achilles' heel, and how does it make them more human?

Write a short story about a character who is perfect in every way except for one specific Achilles' heel.

Discuss the importance of the Achilles tendon in the human body. Why is it so vital for our daily lives?

Compare the mythological Achilles to a modern-day 'hero' (like a tech mogul or an athlete). Do they share similar vulnerabilities?

Frequently Asked Questions

10 questions

It is named after the Greek hero Achilles because, according to myth, his heel was his only vulnerable spot. The tendon is located right above the heel.

Both are correct. 'Achilles' heel' is more traditional in academic writing, while 'Achilles's heel' is also acceptable in modern English.

Yes, you can use it to describe anyone's weakness, but it's usually used for someone who is otherwise quite strong or successful.

Yes, in the context of sports, a torn or ruptured Achilles tendon is one of the most serious injuries an athlete can have, often requiring surgery.

Yes, because it is a proper noun derived from a name, it should always be capitalized.

It is a psychological term for people who try to hide their weaknesses by acting overly strong or aggressive.

It is pronounced uh-KIL-eez. The 'ch' sounds like a 'k'.

Absolutely. In business, it refers to a specific part of the company (like bad customer service) that could cause the whole business to fail.

He was killed during the Trojan War when a prince named Paris shot a poisoned arrow into his heel.

It is less common than 'Achilles' heel' and is mostly used in literature to describe something very strong or heroic.