Indefatigable

Pronunciation: /ɪn.dɪˈfæ.tɪ.ɡə.bəl/

Definitions of indefatigable

adjective showing sustained enthusiastic action with unflagging vitality

Example Sentences

A1 She is an indefatigable worker, always completing her tasks on time.

A2 The indefatigable hiker climbed the mountain without taking any breaks.

B1 The indefatigable detective worked tirelessly to solve the case.

B2 Despite the long hours, he remained indefatigable in his pursuit of excellence.

C1 Her indefatigable determination led her to achieve great success in her career.

C2 The indefatigable efforts of the team resulted in the successful completion of the project.

Examples of indefatigable in a Sentence

formal Despite facing numerous obstacles, the indefatigable researcher continued to pursue groundbreaking discoveries.

informal My grandma is truly indefatigable when it comes to tending to her garden every day.

slang That guy is like an indefatigable energizer bunny, he never seems to run out of energy.

figurative The indefatigable spirit of the protesters could not be dampened by the rain or cold weather.

Grammatical Forms of indefatigable

• past tense: indefatigable
• plural: indefatigables
• comparative: more indefatigable
• superlative: most indefatigable
• present tense: is indefatigable
• future tense: will be indefatigable
• perfect tense: has been indefatigable
• continuous tense: is being indefatigable
• singular: indefatigable
• positive degree: indefatigable
• infinitive: to be indefatigable
• gerund: being indefatigable
• participle: indefatigable

Origin and Evolution of indefatigable

First Known Use: 1601 year

Language of Origin: Latin

Story behind the word: The word 'indefatigable' originated from the Latin word 'indefatigabilis', which is derived from the prefix 'in-' meaning 'not' and 'defatigare' meaning 'to tire out'.

Evolution of the word: Over time, 'indefatigable' has retained its original meaning of being untiring or tireless, but has also come to be used more broadly to describe someone who is persistent, diligent, and relentless in their efforts.