n 锉(刀) (steel tool with a rough surface for smoothing or rubbing away wood，metal，etc)：a flat/a round/a square～扁锉/圆锉/方锉;

vt 用锉刀锉平(光) (cut，smooth，reduce or grind with a file) [T+n，T+n+prep，C+n+adj]：The girl sat there～ing her fingernails. 那个女孩坐在那里锉指甲。～away the rough edges 把粗糙的边锉平;～through the bars on the window 将窗户上的铁栏杆锉断;～the wood smooth 将木头锉光滑;

file down (v adv) 锉小(光) (vt)：He～d it down here so that it'll fit. 他将这儿锉平使它吻合。

→′filings n 铁屑