Archaic superlative form of 'feat,' meaning most neat, elegant, skillful, or accomplished; supreme in finesse or quality.
From Middle English 'feat' (neat, elegant, skillful) plus the superlative suffix '-est.' The base 'feat' comes from Old French 'fait' (made, done, accomplished).
Before '-est' became less common (we now prefer 'most' for longer adjectives), superlatives like 'featest,' 'neatest,' and 'fastest' showed how Germanic English formed comparatives—'feat,' 'feater,' 'featest'!
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