IPA: /ˈneɪlˌhɛd/
KK: /ˈneɪlˌhɛd/
The top part of a nail that is flat or rounded, which helps to hold it in place when driven into a surface.
He used a hammer to drive the nailhead into the wood.
Nailhead → The word is formed from "nail" (from Old English *nægl*, meaning a metal fastener) and "head" (from Old English *heafod*, meaning the upper part or top). A nailhead refers to the top part of a nail, which is the part that is typically hammered in.
Think of a 'metal fastener' ('nail') with a 'top part' ('head') — that's what a nailhead is.