indomitable

adjective

in·​dom·​i·​ta·​ble in-ˈdä-mə-tə-bəl 

: incapable of being subdued : unconquerable

indomitable courage

indomitability

(ˌ)in-ˌdä-mə-tə-ˈbi-lə-tē 

noun

indomitableness

in-ˈdä-mə-tə-bəl-nəs 

noun

indomitably

in-ˈdä-mə-tə-blē 

adverb

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Your Knowledge of Indomitable Cannot Be Tamed

At five punchy syllables, indomitable is an imposing word, so it’s inevitable that some are perplexed by this synonym for impregnable. But it’s not so tough once you break it into parts. The prefix in- (spelled im- before b, m, and p) means “not” in an innumerable collection of English words. (How many have you counted so far?) The common suffix -able means “capable of, fit for, or worthy of.” Combine those two English affixes with the Latin verb domitare (“to tame”), and voila: indomitable. Indomitable was first used in English as a synonym of wild, describing—appropriately enough—things that cannot be tamed, but over time the wildness associated with indomitable developed into a specific kind of invulnerable strength.

Synonyms of indomitable

• unconquerable
• invincible
• unstoppable
• insurmountable
• unbeatable
• armored
• invulnerable
• impregnable
• undefeated
• bulletproof

Examples of indomitable in a Sentence

an indomitable spirit was needed to endure the rigors of pioneer life

Recent Examples on the Web

And yet that bright, sweet aroma is front and center in Creed Aventus, the distinctive eau de parfum widely believed to take inspiration from the French emperor’s indomitable spirit. — Robb Report, 9 Oct. 2026

Part of that similarly indomitable will is that each has subordinated his own earning power to enable his organizations to optimize building around them. — Kansas City Star, 9 Oct. 2026

In Martinez’s versions, Mirabai is indomitable, sexy, exceedingly earnest, sometimes funny, always speaking at the border of body and spirit. — Craig Morgan Teicher, Literary Hub, 1 Oct. 2026

The minute-long trailer for the film documenting late heavy metal icon Ozzy Osbourne‘s final show is packed with emotion, tension, tears and, of course, the indomitable spirit of the Blizzard of Ozz himself. — Gil Kaufman, Billboard, 24 Sep. 2026

Word History

Etymology

Late Latin indomitabilis, from Latin in- + domitare to tame — more at daunt

First Known Use

1634, in the meaning defined above

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Kids Definition

indomitable

adjective

in·​dom·​i·​ta·​ble in-ˈdäm-ət-ə-bəl 

: unconquerable

indomitable courage

indomitability

(ˌ)in-ˌdäm-ət-ə-ˈbil-ət-ē 

noun

indomitableness

in-ˈdäm-ət-ə-bəl-nəs 

noun

indomitably

-blē 

adverb