smooth·en /ˈsmuðən/
(v.)使平滑;使順暢;使平穩
Smooth·en v. t. To make smooth. [Obs.]
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smoothen
v 1: make smooth or smoother, as if by rubbing; "smooth the
surface of the wood" [syn: smooth] [ant: roughen]
2: (of surfaces) make shine; "shine the silver, please";
"polish my shoes" [syn: polish, smooth, shine]
3: become smooth