Explanation at your level:
If you have to do something that is not fun, like a doctor visit, you undergo it. It just means you let it happen to you. You do not choose it, but you must do it.
You use undergo when you talk about changes. For example, 'The old house will undergo repairs.' This means the house will have work done on it to become new again.
In business or school, we use undergo for training. 'All new staff must undergo safety training.' It means you have to sit through the class and finish the process to be ready for work.
Undergo is often used in formal writing. It suggests that the person or object is passive. You don't 'do' the surgery; you undergo it. It highlights that the experience is happening to you.
At an advanced level, undergo implies a significant transition. We might say a company is undergoing a restructuring. It suggests a deep, necessary, and often challenging shift in the state of something, moving from one point to another.
Literarily, undergo carries the weight of endurance. It suggests a stoic acceptance of fate or a necessary passage through hardship. It is the verb of choice when describing a character who must survive a trial to emerge changed, reflecting the etymological roots of 'going under' a burden.
30秒でわかる単語
- Used for serious or necessary experiences.
- Irregular verb: undergo, underwent, undergone.
- Implies a passive experience.
- Common in formal and medical contexts.
Think of undergo as a word for when life happens to you, rather than when you are actively doing something. If you are the one taking action, you might 'do' or 'perform' a task. But if you are the one receiving an experience—especially one that lasts a while—you undergo it.
It is almost always used for things that are necessary or unpleasant. You don't usually 'undergo' a fun vacation; you 'have' one. Instead, you might undergo a surgery, a training program, or a difficult transformation. It implies a process that you must endure or complete.
The word undergo is a classic example of a Germanic compound. It combines the Old English under (meaning beneath or among) and gan (meaning to go). Historically, it literally meant to 'go under' something, as if you were walking beneath a heavy burden.
Over centuries, the meaning shifted from a physical movement to a metaphorical one. By the Middle English period, it began to describe the act of 'submitting' to something or 'taking upon oneself' a responsibility. It has remained a staple in English because it perfectly captures the feeling of being in the middle of a process you cannot easily escape.
In daily life, undergo is considered a formal or semi-formal verb. You will see it frequently in medical reports, news articles, and business documents. You wouldn't typically say, 'I underwent a sandwich for lunch,' because that sounds very strange!
Commonly, it is paired with nouns related to change or health. We talk about undergoing surgery, undergoing training, or undergoing a transformation. Because it carries a weight of seriousness, using it in casual conversation can sometimes make you sound a bit overly dramatic or stiff.
While undergo itself isn't an idiom, it is often associated with phrases that describe endurance. 1. Go through the wringer: To undergo a very difficult experience. 2. Trial by fire: To undergo a severe test. 3. Undergo a sea change: To undergo a complete transformation. 4. Go through the motions: To undergo a process without interest. 5. Undergo scrutiny: To be examined closely by others.
Undergo is an irregular verb. Its forms are: undergo (present), underwent (past), and undergone (past participle). It does not take an object in the same way 'eat' does; it requires a noun phrase that describes the experience.
Pronunciation-wise, the stress is on the final syllable: un-der-GO. In British English, the 'o' is often a pure vowel, while in American English, it may be a diphthong. It rhymes with words like flow, know, and show (if you ignore the prefix).
Fun Fact
It keeps the same Germanic structure as many other 'under-' verbs.
Pronunciation Guide
Starts with 'un-der' then 'go' with a long o.
Clear r-sound in the middle.
Common Errors
- Stress on first syllable
- Mispronouncing the 'o'
- Adding an extra syllable
Rhymes With
Difficulty Rating
Common in formal texts.
Requires formal context.
Sounds formal in speech.
Easy to hear.
What to Learn Next
Prerequisites
Learn Next
上級
Grammar to Know
Irregular Verbs
go-went-gone
Passive Voice
The test was undergone.
Present Perfect
I have undergone.
Examples by Level
I must undergo a test.
I have to do a test.
Modal verb must + base form.
The car will undergo a check.
The car gets checked.
Future tense.
He underwent surgery.
He had an operation.
Irregular past tense.
They undergo training.
They are learning.
Present simple.
She undergoes a change.
She is changing.
Third person singular.
We undergo a process.
We are in a process.
Verb usage.
The building undergoes work.
Work is happening.
Passive sense.
Did you undergo it?
Did you do it?
Interrogative form.
The patient will undergo a scan.
She underwent a lot of stress.
The city is undergoing changes.
He had to undergo an interview.
The team underwent a crisis.
They are undergoing a trial.
The product underwent testing.
I underwent a long wait.
The company is undergoing a major restructure.
She underwent extensive physical therapy after the accident.
The law must undergo a review by the committee.
The project underwent several revisions before completion.
Many students undergo intense pressure during exam season.
The old bridge is undergoing repairs this summer.
He underwent a complete change of heart.
They had to undergo a security check at the airport.
The candidate underwent a rigorous selection process.
The software is currently undergoing beta testing.
The region has undergone a period of rapid economic growth.
The patient underwent a successful heart transplant.
The organization is undergoing a cultural shift.
The materials undergo a chemical reaction when heated.
She underwent a transformation that surprised everyone.
The proposal is undergoing scrutiny by the board.
The candidate underwent a grueling series of interviews.
The historical site is undergoing a meticulous restoration.
The company underwent a total rebranding to stay relevant.
The athlete underwent surgery to repair a torn ligament.
The country is undergoing a profound political evolution.
The theory must undergo rigorous empirical testing.
The system underwent a complete overhaul last year.
The artist underwent a period of deep introspection.
The protagonist undergoes a harrowing journey of self-discovery.
The structure underwent a metamorphosis during the renovation.
The society is undergoing a tectonic shift in values.
The manuscript underwent countless edits before publication.
The species undergoes a complex life cycle in the wild.
The city underwent a renaissance during the late century.
The policy underwent intense debate in the parliament.
The soul undergoes a trial by fire in this novel.
よく使う組み合わせ
Idioms & Expressions
"go through the wringer"
To have a very difficult time.
I really went through the wringer this week.
casual"trial by fire"
A difficult test of someone's ability.
His first day was a trial by fire.
informal"go through the motions"
Doing something without enthusiasm.
He was just going through the motions.
neutral"baptism of fire"
A first difficult experience.
The new job was a baptism of fire.
formal"weather the storm"
To survive a difficult period.
We managed to weather the storm.
neutral"bear the brunt"
To suffer the worst part of something.
He bore the brunt of the criticism.
neutralEasily Confused
Similar prefix.
Undertake means to start a task.
I will undertake this project.
Similar prefix.
Undergo is to experience.
I will undergo surgery.
Similar prefix.
To guess too low.
Don't underestimate him.
Similar prefix.
Passive experience.
I undergo tests.
Sentence Patterns
Subject + undergo + noun
He underwent surgery.
Subject + is undergoing + noun
The house is undergoing repairs.
Subject + has undergone + noun
She has undergone training.
The + noun + undergoes + noun
The metal undergoes change.
Subject + will undergo + noun
They will undergo testing.
語族
Nouns
Verbs
Adjectives
関連
How to Use It
7
Formality Scale
よくある間違い
Undergo is for unpleasant/necessary tasks, not fun ones.
Undergo is not used for daily physical activities.
Undergo is an irregular verb.
Undergo implies a serious process.
Undergo is for passive experiences.
Tips
Memory Palace
Imagine a hospital bed.
Native usage
Use it for medical/training.
Cultural insight
Very common in news.
Grammar rule
Irregular verb.
Say it right
Stress the end.
Don't say undergoed
Use underwent.
Did you know?
It is Germanic.
Study smart
Group with 'process'.
Formal tone
Use in reports.
Passive
It is a passive verb.
Memorize It
Mnemonic
Under-Go: You go under the process.
Visual Association
A person walking through a tunnel (the process).
Word Web
チャレンジ
Write three sentences about things you have undergone.
語源
Old English
Original meaning: To go under or submit to.
文化的な背景
None, but can sound clinical.
Used often in formal news and medical contexts.
Practice in Real Life
Real-World Contexts
Medical
- undergo surgery
- undergo treatment
- undergo a scan
Professional
- undergo training
- undergo review
- undergo evaluation
Construction
- undergo repairs
- undergo renovation
- undergo changes
Academic
- undergo testing
- undergo analysis
- undergo revision
Conversation Starters
"Have you ever had to undergo a difficult training?"
"What kind of changes does a city undergo?"
"Why do people undergo surgery?"
"Is it better to undergo a test or just avoid it?"
"How does a person undergo a transformation?"
Journal Prompts
Write about a time you had to undergo a change.
Describe a process you have undergone recently.
Compare undergoing a test to studying for one.
Reflect on why we use 'undergo' for serious things.
よくある質問
8 問No, undergo is for passive experiences.
No, that is incorrect.
Yes, mostly.
Underwent.
Undergone.
Usually no.
Yes, in professional settings.
It often implies a change.
自分をテスト
He had to ___ surgery.
Surgery is a process you undergo.
Which is correct?
Tests are necessary processes.
Undergo is usually for fun things.
It is for serious/necessary things.
Word
意味
Matching verbs to nouns.
Subject-verb-object order.
The city is ___ a change.
Continuous tense.
Past tense of undergo?
Irregular verb.
Undergo can be used for passive experiences.
It is inherently passive.
Word
意味
Advanced collocations.
Present perfect structure.
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Summary
Undergo is the verb we use when we must experience a necessary, often serious, process.
- Used for serious or necessary experiences.
- Irregular verb: undergo, underwent, undergone.
- Implies a passive experience.
- Common in formal and medical contexts.
Memory Palace
Imagine a hospital bed.
Native usage
Use it for medical/training.
Cultural insight
Very common in news.
Grammar rule
Irregular verb.
例文
The building will undergo major renovations next year.
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