Synonyms for indefatigable
- adjective
Most common
tireless inexhaustible untiring unflagging indomitable unsinkable
All synonyms
Adjective
1. Tireless
tireless, unflagging, untiring, inexhaustible, assiduous, relentless, unremitting, energetic, persevering, persistent, laborious, patient, unwearying, sedulous, industrious, diligent, unwearied dated
Other
Definitions
- adj. 1
Extremely persistent and untiring.
Example sentences
- tireless Thanks to her tireless efforts, we reached our goal.
- inexhaustible Books are inexhaustible sources of knowledge.
- indomitable One village of indomitable Gauls still resists the invaders.
- unsinkable The Titanic was believed to be practically unsinkable.
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| indefatigable | falling | |
| tireless | rising | |
| inexhaustible | falling | |
| untiring | falling | |
| unflagging | steady | |
| indomitable | steady |
Use in printed books, per decade from 1850 to 2019.
By length
- 7 letters
- patient2
- 8 letters
- diligent3, tireless3, untiring, sedulous
- 9 letters
- energetic4, laborious4, assiduous3, unwearied
- 10 letters
- persistent3, relentless3, unsinkable4, unflagging3, unwearying
- 11 letters
- industrious4, indomitable5, persevering4, unremitting4
- 13 letters
- inexhaustible5
The small number after each word is its number of syllables (patient2 = 2 syllables).
In other languages
- Français
- infatigable
- Italiano
- instancabile
- Español
- incansable
- Deutsch
- unermüdlich