IPA: /ˈθʌmˌtæk/
KK: /θʌmˌtæk/
A small pin with a flat head that is used to attach papers or other items to a surface, often pressed in with the thumb.
I used a thumbtack to hang my notes on the bulletin board.
To attach something to a surface using a small pin with a flat head.
She used a thumbtack to secure the note to the bulletin board.
Past: thumbtacked
Past Participle: thumbtacked
Thumbtack → The word is formed from "thumb" (from Old English "þuma", meaning the short, thick digit) and "tack" (from Middle English "tac", meaning a small nail or pin). A thumbtack is a small pin that can be pressed in with the thumb.
Think of using your 'thumb' to press down a 'tack' — that's how you remember that a thumbtack is a pin you push in with your thumb.