smooth (adj.)

Old English smoð "smooth, serene, calm," variant of smeðe "free from roughness, not harsh, polished; soft; suave; agreeable," of unknown origin and with no known cognates. Of words, looks, "pleasant, polite, sincere" late 14c., but later "flattering, insinuating" (mid-15c.). Slang meaning "superior, classy, clever" is attested from 1893. Sense of "stylish" is from 1922.

Smooth-bore in reference to guns is from 1812. smooth talk (v.) is recorded from 1950. A 1599 dictionary has smoothboots "a flatterer, a faire spoken man, a cunning tongued fellow." The usual Old English form was smeðe, and there is a dialectal smeeth found in places names, such as Smithfield, Smedley.

smooth (v.)

late Old English smoþ "to make smooth," replacing smeðan "to smooth, soften, polish; appease, soothe;" smeðian "smoothen, become smooth," from the source of smooth (adj.). Meaning "to make smooth" is c. 1200. Related: Smoothed; smoothing. Middle English had also a verb form smoothen (mid-14c.).

updated on March 30, 2022

Definitions of smooth from WordNet
smooth (adj.)
having a surface free from roughness or bumps or ridges or irregularities;
a smooth tabletop
smooth skin
a smooth road
water as smooth as a mirror
smooth fabric
smooth (adj.)
smoothly agreeable and courteous with a degree of sophistication;
the manager pacified the customer with a smooth apology for the error
Synonyms: politic / suave / bland
smooth (adj.)
of the margin of a leaf shape; not broken up into teeth;
smooth (adj.)
smooth and unconstrained in movement;
a long, smooth stride
Synonyms: fluent / fluid / liquid
smooth (adj.)
of motion that runs or flows or proceeds without jolts or turbulence;
a smooth ride
smooth (adj.)
lacking obstructions or difficulties;
the bill's path through the legislature was smooth and orderly
smooth (adj.)
(of a body of water) free from disturbance by heavy waves;
a smooth channel crossing
Synonyms: placid / quiet / still / tranquil / unruffled
smooth (adj.)
(music) without breaks between notes; smooth and connected;
Synonyms: legato
smooth (v.)
make smooth or smoother, as if by rubbing;
smooth the surface of the wood
Synonyms: smoothen
smooth (v.)
make (a surface) shine;
Synonyms: polish / smoothen / shine
smooth (v.)
free from obstructions;
smooth the way towards peace negotiations
Synonyms: smooth out
smooth (n.)
the act of smoothing;
he gave his hair a quick smooth
From, not affiliated with etymonline.