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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
ROGET THESAURUS

WORDNET DICTIONARY

Verb smoothen has 3 senses

• smoothen(v = verb.contact) smooth - make smooth or smoother, as if by rubbing; "smooth the surface of the wood"
is one way to change surface
Sample sentences:
Somebody ----s something
Something ----s something

• smoothen(v = verb.contact) polish, shine, smooth - make (a surface) shine; "shine the silver, please"; "polish my shoes"
is one way to beautify, embellish, fancify, prettify
Sample sentence:
They smoothen the glass tubes

• smoothen(v = verb.change) Array - become smooth; Array
is one way to change
Sample sentence:
Something ----s

CIDE DICTIONARY

ROGET THESAURUS

smoothen

Smoothness

VB smooth, smoothen, plane, file, mow, shave, level, roll, macadamize, polish, burnish, calender, glaze, iron, hot-press, mangle, lubricate.

For further exploring for "smoothen" in Webster Dictionary Online