indefatigable

/ˌɪndɪˈfætɪɡəbl/ (bre, ipa) · /ˌɪndɪˈfætɪɡəbl/ (ame, ipa) · /ˌin-di-ˈfa-ti-gə-bəl/ (ame, mw)

indefatigable — adjective

  • indefatigablepositive
  • more indefatigablecomparative
  • most indefatigablesuperlative

1. always full of energy and continuing to work toward a goal without ever showing

1.形容詞C1
釋義

always full of energy and continuing to work toward a goal without ever showing signs of tiredness or giving up

例句

The indefatigable nurse Chidi worked two extra shifts without complaining.

attributive: indefatigable + noun

Even after hiking for twelve hours, Anjali remained indefatigable and cheerful.

remained + indefatigable (predicative)

同義詞
  • tireless

    most common alternative; slightly less formal and used in a wider range of contexts

  • untiring

    very similar in meaning; also somewhat formal and literary

  • unflagging

    emphasises steady, constant energy that does not diminish over time

  • persevering

    focuses on continuing despite difficulties rather than lack of fatigue

反義詞
  • lazy

    suggests a lack of willingness to make an effort, rather than becoming tired

  • lethargic

    implies a lack of energy or enthusiasm, often due to illness or low mood

  • weary

    describes a state of tiredness rather than a personality trait

文法句型

indefatigable + noun

be indefatigable in/at + noun/gerund

用法筆記

Common in formal or literary contexts; rarely used in everyday casual conversation. Often describes a person's approach to work, study, service, or a long-term goal.

常見錯誤

❌She became indefatigable after a short rest.
✅She remained indefatigable even after working all night.
💡'indefatigable' describes a lasting quality, not a temporary state that comes and goes after rest.
❌My friend is indefatigable at playing video games.
✅The researcher was indefatigable in her pursuit of a cure.
💡'indefatigable' is formal and typically used for serious or sustained efforts, not casual leisure activities.