noun / verb
tack
TAK/tæk/
A small nail used to attach material.
Each steel tack has a broad head, short shaft, and sharp point.

Etymology
Old North French taque named a nail, pin, or peg. The selected English sense narrows that fastening vocabulary to a short nail with a flat head.
In context
this is a Tac it's not a nail a tack they're different they've got um very flat head a very flat underside of the head as well
More examples
- Small tacks hold the fabric against the wooden frame.
- He tacked a notice to the bulletin board.
- The restaurant tacks a delivery fee onto every order.
Forms
tack · tacks · tacked · tacking