smoothen
1. [ verb ] (of surfaces) make shine
Synonyms: polish smooth shine
Examples:

"shine the silver, please" "polish my shoes"

Related terms: beautify buff Simonize slick gloss polish shining buffer rub
2. [ verb ] make smooth or smoother, as if by rubbing
Synonyms: smooth
Examples:

"smooth the surface of the wood"

Related terms: roughen change_surface file sandpaper rake plane float launch strip sandblast gloss_over rub
3. [ verb ] become smooth
Related terms: change
Similar spelling:   smoothened
  smoothness
  smoothhound