Someone who says something; a person who makes statements or claims about something (often used in phrases like 'doer not a sayer').
From 'say' (Old English 'secgan') plus '-er' (one who does). A straightforward agent noun formation, common in English.
The distinction between 'sayers' and 'doers' comes from old proverbs about actions speaking louder than words, yet we live in an age where 'sayers' (influencers, commentators) often have more power than traditional 'doers.'
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