1. 使平滑：smoothed 平滑的 | smoothen 使平滑 | smoothen 使平稳

2. 使平稳：smoothen 使平滑 | smoothen 使平稳 | smoothen 使顺畅

3. 使顺畅：smoothen 使平稳 | smoothen 使顺畅 | smoother 路面整平机

4. 使平滑/使顺畅/使平稳：smoothed /平滑的/ | smoothen /使平滑/使顺畅/使平稳/ | smoother /弄平的人/路面整平机/修光工具/

verb

1. become smooth

2. make (a surface) shine

    e.g. shine the silver, please
           polish my shoes

    Synonym: polishsmoothshine

3. make smooth or smoother, as if by rubbing

    e.g. smooth the surface of the wood

    Synonym: smooth