What does indefatigable mean?

Definitions for indefatigable
ˌɪn dɪˈfæt ɪ gə bəlin·de·fati·ga·ble

This dictionary definitions page includes all the possible meanings, example usage and translations of the word indefatigable.

Princeton's WordNet

  1. indefatigable, tireless, unflagging, unwearyingadjective

    showing sustained enthusiastic action with unflagging vitality

    "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence"


  1. indefatigableadjective

    Extremely persistent and untiring.

  2. Etymology: From indefatigabilis, from in- + de- + fatigo.

Samuel Johnson's Dictionary

  1. Indefatigableadjective

    Unwearied; not tired; not exhausted by labour.

    Etymology: indefatigabilis, in and defatigo, Lat.

    Who shall spread his airy flight,
    Upborne with indefatigable wings,
    Over the vast abrupt. John Milton.

    The ambitious person must rise early and sit up late, and pursue his design with a constant indefatigable attendance: he must be infinitely patient and servile. South.


  1. indefatigable

    Indefatigable refers to the ability to persist tirelessly or to continue doing something without giving in to fatigue or tiredness. It is typically used to describe a person or effort that is persistent, untiring, and consistently determined.

Webster Dictionary

  1. Indefatigableadjective

    incapable of being fatigued; not readily exhausted; unremitting in labor or effort; untiring; unwearying; not yielding to fatigue; as, indefatigable exertions, perseverance, application

Chambers 20th Century Dictionary

  1. Indefatigable

    in-de-fat′i-ga-bl, adj. that cannot be fatigued or wearied out: unremitting in effort.—n. Indefat′igableness.—adv. Indefat′igably. [Fr.,—L. indefatigabilisin, not, de, fatigāre, to tire.]

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  1. Chaldean Numerology

    The numerical value of indefatigable in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of indefatigable in Pythagorean Numerology is: 5

Examples of indefatigable in a Sentence

  1. Logan Pearsall Smith:

    The indefatigable pursuit of an unattainable perfection, even though it consists in nothing more than the pounding of an old piano, is what alone gives meaning to our life on this unavailing star.

  2. Charles Peguy:

    The honest man must be a perpetual renegade, the life of an honest man a perpetual infidelity. For the man who wishes to remain faithful must take himself perpetually unfaithful to all the continual, successive, indefatigable, renascent errors.

  3. Mark Wilson/Getty Images Hoyer:

    I think we have a very respectful relationship, i think we have a business-like relationship but I like Nancy and I admire Nancy greatly. She is an extraordinary human being. She’s indefatigable. She has extraordinary energy.

  4. The New Yorker:

    Kelly had proved to be an indefatigable sleuth, and he played a key role in forcing the Iraqi government to admit that it had a biological weapons program.

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Translations for indefatigable

From our Multilingual Translation Dictionary

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"indefatigable." Definitions.net. STANDS4 LLC, 2024. Web. 13 Jul 2024. <https://www.definitions.net/definition/indefatigable>.

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    evincing the presence of a deity
    A askant
    B numinous
    C splay
    D bristly

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