B1 adjective #5,000 más común 2 min de lectura

diligent

A diligent person works very hard and is careful to do things correctly.

Explanation at your level:

A diligent person is a hard worker. If you are diligent, you do your homework well and you do not forget your tasks. You try your best every day. Teachers like students who are diligent because they listen and learn carefully.

Being diligent means you are careful. You check your work to make sure there are no mistakes. If you have a job or a school project, a diligent person finishes it on time and does a very good job. It is a good quality to have.

A diligent person shows great care and effort. You might be described as diligent if you are consistent in your work habits. For example, a diligent student studies every day, not just the night before the exam. It implies that you are reliable and you take your responsibilities seriously.

In a professional context, being diligent is highly valued. It suggests a level of conscientiousness that goes beyond the minimum requirements. A diligent employee is someone who anticipates problems and handles tasks with precision. It is a common word used in formal feedback or when discussing someone's professional reputation.

The term diligent often implies a sustained, intellectual, or moral commitment to a task. It suggests that the individual possesses the discipline to maintain high standards despite potential distractions or fatigue. In academic or legal fields, 'due diligence' is a specific term referring to the necessary research or investigation one must complete before making a decision.

Etymologically, diligent carries the weight of 'loving' what one does. At the C2 level, we recognize that diligence is not merely about speed or output, but about the integrity of the process. It is a trait often attributed to scholars, master craftspeople, and those who demonstrate a profound respect for their craft. To be diligent is to exhibit a form of quiet, persistent excellence that defines one's character.

Palabra en 30 segundos

  • Diligent means working hard and carefully.
  • It is a very positive adjective.
  • Commonly used in school and work.
  • The noun form is diligence.

When you describe someone as diligent, you are giving them a high compliment. It means they are someone who puts real effort into their tasks, consistently and carefully.

Think of the most reliable person you know—the one who checks their work twice, meets every deadline, and stays focused even when things get boring. That is a diligent person! It is not just about working fast; it is about working well.

The word diligent has a beautiful history. It comes from the Latin word diligere, which means 'to value highly' or 'to love'.

Back in the day, if you were diligent, it literally meant you were someone who 'loved' or 'valued' your work enough to give it your full attention. Over time, the meaning shifted from 'loving' to the 'careful effort' we associate with it today in English.

You will hear diligent most often in professional or academic settings. It is a positive, slightly formal word that is perfect for performance reviews or letters of recommendation.

Commonly, we talk about being diligent in one's studies or a diligent researcher. It is a great way to praise someone's work ethic without sounding too casual.

While 'diligent' doesn't have many direct idioms, it is often associated with phrases like:

  • Nose to the grindstone: Working hard and diligently.
  • Burning the midnight oil: Working late into the night.
  • Dotting your i's and crossing your t's: Being extremely thorough.
  • Going the extra mile: Doing more than is required.
  • Rolling up your sleeves: Getting ready for hard work.

Diligent is an adjective. It is pronounced DIL-ih-junt in both American and British English. The stress is on the first syllable.

It is often used with the preposition 'in' (e.g., 'diligent in his efforts') or 'about' (e.g., 'diligent about cleaning'). It rhymes with words like negligent (though they are opposites!).

Fun Fact

It shares a root with 'delight'!

Pronunciation Guide

UK /ˈdɪl.ɪ.dʒənt/

Clear 'd', short 'i', soft 'j' sound.

US /ˈdɪl.ə.dʒənt/

Similar to UK, slightly more relaxed 'a' sound.

Common Errors

  • Mispronouncing the 'j' as a hard 'g'
  • Stressing the second syllable
  • Dropping the final 't'

Rhymes With

negligent intelligent belligerent indigent contingent

Difficulty Rating

Lectura 2/5

Common word

Writing 2/5

Easy to use

Speaking 2/5

Easy to pronounce

Escucha 2/5

Clear sound

What to Learn Next

Prerequisites

hard work careful

Learn Next

conscientious assiduous industrious

Avanzado

due diligence perseverance

Grammar to Know

Adjectives

He is diligent.

Prepositions

Diligent in work.

Word Forms

Diligent vs Diligence.

Examples by Level

1

He is a diligent student.

He works hard.

Adjective before noun.

2

She is very diligent.

She works carefully.

Adjective after verb.

3

They are diligent workers.

They work well.

Plural subject.

4

Be diligent with your work.

Work hard.

Imperative.

5

A diligent person is helpful.

Hard workers help.

Subject noun phrase.

6

My dad is diligent.

My dad works hard.

Possessive adjective.

7

Stay diligent at school.

Keep working hard.

Linking verb.

8

He was diligent today.

He worked hard today.

Past tense.

1

She is diligent about her chores.

2

The diligent boy finished his homework early.

3

He earned a promotion through diligent work.

4

Teachers appreciate diligent students.

5

She is a diligent researcher.

6

They are diligent in their training.

7

A diligent effort is required.

8

He remained diligent throughout the project.

1

The team was diligent in checking the data for errors.

2

She maintained a diligent approach to her studies.

3

His diligent preparation paid off during the interview.

4

We need to be diligent about our safety procedures.

5

The company is known for its diligent customer service.

6

He is a very diligent worker who never misses a deadline.

7

She showed diligent attention to detail.

8

You must be diligent if you want to succeed in this field.

1

The committee conducted a diligent review of the proposal.

2

His diligent research led to a major discovery.

3

She is diligent in her pursuit of excellence.

4

The investigators were diligent in gathering all the evidence.

5

Despite the difficulties, she remained diligent in her efforts.

6

A diligent student will always find time to review.

7

He was praised for his diligent handling of the crisis.

8

The project requires a diligent and focused team.

1

The lawyers performed their due diligence before the merger.

2

Her diligent application to the task was truly impressive.

3

He is a diligent observer of social trends.

4

The architect's diligent planning ensured the building's stability.

5

It requires a diligent mind to solve such complex puzzles.

6

She is diligent in upholding the highest ethical standards.

7

The report is a result of diligent investigation.

8

His diligent stewardship of the charity has been remarkable.

1

The manuscript reflects a lifetime of diligent scholarship.

2

She approached the restoration with the diligent care of an artist.

3

The diplomat's diligent efforts prevented a conflict.

4

Such diligent attention to nuance is rare.

5

He is a diligent curator of historical archives.

6

The success of the experiment was due to their diligent monitoring.

7

Her diligent practice transformed her into a virtuoso.

8

The judge was known for her diligent interpretation of the law.

Colocaciones comunes

diligent student
diligent effort
due diligence
diligent worker
diligent in
diligent about
diligent researcher
diligent search
diligent approach
highly diligent

Idioms & Expressions

"due diligence"

necessary research before a decision

Do your due diligence before buying the house.

formal

"nose to the grindstone"

working hard and steadily

He kept his nose to the grindstone all summer.

casual

"burn the midnight oil"

work late into the night

She burned the midnight oil to finish the project.

casual

"dot the i's and cross the t's"

be very thorough

Make sure to dot your i's and cross your t's on the contract.

neutral

"leave no stone unturned"

look everywhere/do everything

The police left no stone unturned in their search.

neutral

"roll up one's sleeves"

prepare for hard work

It is time to roll up our sleeves and start.

casual

Easily Confused

diligent vs intelligent

similar sounds

smart vs hard-working

He is intelligent but not diligent.

diligent vs negligent

rhyme

opposite meanings

He was diligent, not negligent.

diligent vs diligent

spelling

careful vs fast

Fast work isn't always diligent.

diligent vs diligence

noun/adj

thing vs quality

Diligence is a virtue.

Sentence Patterns

A1

Subject + is + diligent

He is diligent.

B1

Subject + is + diligent + in + noun

She is diligent in her work.

B1

Subject + is + diligent + about + noun

He is diligent about his health.

B2

It + requires + diligent + effort

It requires diligent effort.

C1

He + remained + diligent + throughout

He remained diligent throughout.

Familia de palabras

Nouns

diligence the quality of being diligent

Adjectives

diligent hard-working

Relacionado

diligere Latin root

How to Use It

frequency

7

Formality Scale

Formal Neutral Casual Slang

Errores comunes

confusing with 'intelligent' diligent
They sound similar but mean different things (smart vs hard-working).
using 'diligent' as a noun diligence
Diligent is an adjective; the noun is diligence.
using 'diligent' for speed fast/quick
Diligent means careful, not necessarily fast.
wrong preposition diligent in/about
Avoid using 'diligent on'.
using 'diligent' for objects well-made
Diligent describes people's actions, not inanimate objects.

Tips

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Memory Palace

Imagine a student at a desk working hard.

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Professional Use

Use it in your resume.

🌍

Cultural Insight

Valued in Western workplaces.

💡

Grammar Shortcut

Use 'in' or 'about' after it.

💡

Say It Right

Stress the first syllable.

💡

Don't confuse

Don't confuse with intelligent.

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Did You Know?

It means 'to love' in Latin.

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Study Smart

Use it to describe your own habits.

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Formal Writing

Great for cover letters.

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Word Family

Learn diligence, diligent, diligently.

Memorize It

Mnemonic

DIL-IGENT: DILl pickles are IGENT (in a gentle/careful way).

Visual Association

A busy bee working on a flower.

Word Web

hard work care success focus

Desafío

Write a sentence about someone you admire.

Origen de la palabra

Latin

Original meaning: To value highly or love

Contexto cultural

None.

Highly prized in business and education.

Often used in school reports. Common in business jargon.

Practice in Real Life

Real-World Contexts

at work

  • diligent employee
  • diligent worker
  • diligent effort

at school

  • diligent student
  • diligent study
  • diligent learner

research

  • diligent search
  • diligent investigation
  • due diligence

daily life

  • diligent about chores
  • diligent care
  • diligent planning

Conversation Starters

"Who is the most diligent person you know?"

"Why is being diligent important in a job?"

"Do you consider yourself a diligent student?"

"How can someone become more diligent?"

"Is it better to be fast or diligent?"

Journal Prompts

Describe a time you were very diligent.

Why do you think diligence leads to success?

Write about a task that requires a lot of diligence.

How do you stay diligent when you are tired?

Preguntas frecuentes

8 preguntas

Yes, it is very positive.

Usually for people, but you can say a diligent guard dog.

Diligently.

Diligence.

Yes, it is common in professional settings.

No, it means careful.

Yes.

Yes, in education and business.

Ponte a prueba

fill blank A1

She is a ___ student.

¡Correcto! No del todo. Respuesta correcta: diligent

Diligent describes a good student.

multiple choice A2

What does diligent mean?

¡Correcto! No del todo. Respuesta correcta: Hard-working

Diligent means working hard.

true false B1

A diligent person is usually careless.

¡Correcto! No del todo. Respuesta correcta: Falso

Diligent means careful.

match pairs B1

Word

Significado

All matched!

Synonyms match.

sentence order B2

Toca las palabras de abajo para formar la oración
¡Correcto! No del todo. Respuesta correcta:

Subject-verb-adjective order.

fill blank B2

He was ___ in his research.

¡Correcto! No del todo. Respuesta correcta: diligent

Needs an adjective.

multiple choice C1

Which is a synonym?

¡Correcto! No del todo. Respuesta correcta: Assiduous

Assiduous means diligent.

true false C1

Due diligence is a business term.

¡Correcto! No del todo. Respuesta correcta: Verdadero

It means careful research.

sentence order C2

Toca las palabras de abajo para formar la oración
¡Correcto! No del todo. Respuesta correcta:

Correct adverb placement.

fill blank C2

His ___ was noted by the boss.

¡Correcto! No del todo. Respuesta correcta: diligence

Needs a noun.

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