nailfile
/ˈneɪlˌfaɪl/
noun
- A small, flat tool with a rough surface used to shape and smooth the edges of fingernails or toenails.
- A metal nailfile lasts longer than an emery board.
- He keeps a nailfile in his desk drawer for quick touch-ups.
- She used a nailfile to round the sharp corners of her nails.