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doer

/ˈduː.ə/ noun

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about doer at Wordnik → Where our words come from →

  1. Someone who does, performs, or executes; an active person, an agent.
    a doer of good

Origin

From Middle English doer, doar, doere, from Old English dōere (“a doer; worker”), equivalent to do + -er.

From Wiktionary, via Kaikki.org (CC BY-SA)