indefatigable
/ˌɪndɪˈfatɪɡəb(ə)l
/adjective
(Of a person or their efforts) persisting tirelessly: an indefatigable defender of human rights...
- He was indefatigable in his industry and sense of curiosity.
- But he was just indefatigable when it came to his relationships with women.
- He's indefatigable, like the sides he puts on the park.
Synonyms
tireless, untiring, never-tiring, unwearied, unwearying, unflagging;
energetic, dynamic, enthusiastic;
unrelenting, relentless, unremitting, unswerving, unfaltering, unshakeable, indomitable;
persistent, tenacious, determined, dogged, single-minded, assiduous, industrious
Derivatives
indefatigability
/ noun ...- Their courage, strength and indefatigability.
- Yet somehow by the end, there's room for forgiveness and hope and and endorsement of the indefatigability of the human spirit.
- The originality, the indefatigability, the uncanny sense of self-promotion, the converting of art into sensibility, put him, it seems to me, into the most rarefied circle.
indefatigably
/ adverb ...- The spirit of industrialism, which is indefatigably active in the development of trade relations, undermines the warlike spirit.
- He was all kinds of an artist - poet, sculptor, architect, painter - and although he worked with the irregularity of true genius, he worked indefatigably when once he began.
- She is the dinner guest every hostess covets, the indefatigably charming conversation partner who, no matter how obscure the topic, keeps things going.
Origin
Early 17th century: from French, or from Latin indefatigabilis, from in- 'not' + de- 'away, completely' + fatigare 'wear out'.
fatigue from mid 17th century:
The early use of the word was to mean ‘a task or duty causing weariness’; this is seen in the military use of the plural fatigues, duties sometimes allocated as a punishment. It comes via French from Latin fatigare ‘tire out’. The opposite is found in indefatigable (early 17th century).