Indefatigable

in-duh-FAT-ih-guh-buhl

/ˌɪn.dɪˈfæt.ɪ.ɡə.bəl/

Adjective

Meaning

  • Indefatigable describes someone who is extremely persistent and determined, continuing to work or strive without becoming tired or giving up.
  • It refers to having unwavering energy and dedication toward a task or goal.

Examples

  • Her indefatigable spirit helped the team overcome every challenge.
  • Scientists worked with indefatigable effort to find a solution to the crisis.
  • He is an indefatigable advocate for children’s education.

Synonyms & Antonyms

Synonyms Antonyms
Tireless Relentless Persistent Unwavering Unflagging Dogged Determined Lazy Exhausted Easily Discouraged Fatigued Unmotivated

Word Forms

  • Indefatigability / Indefatigableness (noun)
  • Indefatigably (adverb)

Origin / Etymology

Derived from Late Latin indefatigabilis meaning “not to be wearied,” formed from in (not) + defatigare (to wear out).

Grammar Information

  • Always used attributively or predicatively as an adjective.
  • Often describes people, attitudes, or efforts.

Translations

  • Hindi: अटूट / श्रमहीन
  • Spanish: incansable
  • French: infatigable
  • German: unermüdlich
  • Chinese: 不知疲倦的
  • Arabic: لا يكلّ ولا يملّ

Idioms & Phrases

  • Indefatigable energy – unwavering effort or enthusiasm
  • Indefatigable worker – someone who never stops working hard
  • Indefatigable optimism – persistent positivity

Related Words

  • Tenacious
  • Persevering
  • Resilient
  • Diligent
  • Resolute