nail file
nounCA, US, UK /ˈneɪl ˌfaɪl/ · CA /ˈneɪl ˌfʌɪl/
1
A small file made of soft metal, or a board covered with fine sandpaper, for filing and shaping one's fingernails and toenails.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.