Word Origin & History
smoothO.E. smoð "free from roughness, not harsh," of unknown origin. Sense of "pleasant, polite, sincere" first recorded c.1390. Slang meaning "superior, classy, clever" is attested from 1893. The verb is first recorded c.1440. Smooth-bore in ref. to guns is from 1812. smooth talk (v.) is recorded from
EXPAND1950. A 1599 dictionary has smoothboots "a flatterer, a faire spoken man, a cunning tongued fellow." The usual O.E. form was smeðe, and there is a dial. smeeth found in places names, e.g.
Smithfield, Smedley.
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