IPA: /ˈʃɑːrpənər/
KK: /ˈʃɑːrpənər/
A tool used to make pencils or other objects sharp by grinding or cutting away material.
I need to use a sharpener to get my pencil ready for the exam.
Sharpener → It is formed from "sharp" (from Old English "scearp", meaning having a fine edge or point) and "-er" (meaning a person or thing that performs an action). A sharpener is a device or person that makes something sharp.
Think of something that makes an edge 'fine' or 'pointed' — that's what a sharpener does.