Dexterity
means right-handed skill (Latin, dexter, the right hand). “Awkward” (q.v.) means left-handed; gauche is the French, and sinister the Latin for the left hand. Certainly the German left-handed marriages are sinister ones.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.