indefatigable

/ˌɪndɪˈfætɪɡəbəl/in-dih-FA-tih-guh-buhl

/ˌɪndɪˈfætɪɡəbəl/in-dih-FA-tih-guh-buhl

Meaninguntiring

Common meaning: tireless

inin, into; (before adjectives) not
dedown, away, off; undoing
fatigto tire outLewis & Short, Latin Dictionary (1879), p. 729 · scan
ableable to be

‘in, into’ + ‘down, away, off’ + ‘to tire out’ → indefatigable

Journey through time

Latinfatīgō, fatīgāre‘to tire out’
Frenchindéfatigablesource
Englishindefatigable‘tireless’ · today

in- also in: incest incite induce infamy infant

de- also in: deter decamp decide deduce defame

fatig also in: fatigue

Sources & notes

Meaning: “Meaning” is the sense that emerges from the word’s roots; “Common meaning” is today’s everyday sense. Both written by us.

Pronunciation

UK IPA: converted from the US form by rule (unchecked). Respelling: generated.
No UK recording; the speaker uses your device’s en-GB voice.
US IPA: CMUdict (BSD-2), converted to IPA by rule. Respelling: generated.
No US recording; the speaker uses your device’s en-US voice.

Origin: Built on Latin fatīgō ‘to tire out’.

Did you know: our wording, based on Lewis & Short, Latin Dictionary (1879), entry fatīgō, p. 729 · dictionary scan

Roots

fatīgō, fatīgāre Latin “to tire out”

Related words

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