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indelible

/ɪnˈdeləbl/
English Definition
adj. Permanent and lasting; unforgettable
中文释义
不可磨灭的，擦不掉的
Example Sentence

The discovery of penicillin left an indelible mark on medical history, transforming the treatment of bacterial infections.

青霉素的发现给医学史留下了不可磨灭的印记，改变了细菌感染的治疗方式。

Synonyms
permanent lasting unforgettable
Antonyms
erasable temporary
💡
Memory Aid / 记忆技巧
in-(not) + del(erase, delete) + ible → unerasable, unforgettable.
Know this word? Mark it mastered, or move on.
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Practice — Definition Match

Which choice best defines “indelible”?

  1. A Able to be heard
  2. B Thoughtful reflective melancholy
  3. C Permanent and lasting; unforgettable
  4. D Happening as a minor part of something else
Show answer

C — Permanent and lasting; unforgettable. “indelible” means Permanent and lasting; unforgettable.

Practice — Which Word Fits?

Which word means “Permanent and lasting; unforgettable”?

  1. A pensive
  2. B incidental
  3. C audible
  4. D indelible
Show answer

D — indelible. “indelible” means Permanent and lasting; unforgettable.

More Difficult-level SAT words

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Common questions about “indelible”

What does “indelible” mean?

indelible — Permanent and lasting; unforgettable. In Chinese: 不可磨灭的，擦不掉的.

How do you pronounce “indelible”?

indelible is pronounced /ɪnˈdeləbl/.

How is “indelible” used in a sentence?

The discovery of penicillin left an indelible mark on medical history, transforming the treatment of bacterial infections. (青霉素的发现给医学史留下了不可磨灭的印记，改变了细菌感染的治疗方式。)

What are synonyms for “indelible”?

permanent, lasting, unforgettable — all close in meaning to indelible (Permanent and lasting; unforgettable).

What is the opposite of “indelible”?

erasable, temporary — each the opposite of indelible (Permanent and lasting; unforgettable).

Is “indelible” an SAT vocabulary word?

Yes. indelible is on the SAT Prep Difficult list — the higher-register words that decide the hard questions. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.

How can I remember “indelible”?

in-(not) + del(erase, delete) + ible → unerasable, unforgettable.

Progress / 学习进度
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This level: 0 mastered (0% of the level)
The Digital SAT tests vocabulary through Words in Context questions, never as a standalone definition. Learn the word, then use it against a real passage.
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