coun·ter·sink 
(kountər-sĭngk′)
(kountər-sĭngk′)n.
1. A hole with the top part enlarged so that the head of a screw or bolt will lie flush with or below the surface.
2. A tool for making such a hole.
tr.v. coun·ter·sunk (-sŭngk′), coun·ter·sink·ing, coun·ter·sinks
1. To make a countersink on or in.
2. To drive (a screw or bolt) into a countersink.
countersinksingle-flute countersink bit
- Indo-European root: perə-
- Indo-European root: perə-
- Indo-European root: pes-
- Indo-European root: pet-
- Indo-European root: petə-
- Indo-European root: peuk-
- Indo-European root: peuə-
- Indo-European root: pezd-
- Indo-European root: plat-
- Indo-European root: plek-
- Indo-European root: pleu-
- Indo-European root: plāk-
- Indo-European root: plāk-
- Indo-European root: pneu-
- Indo-European root: porko-
- Indo-European root: poti-
- Indo-European root: prek-
- Indo-European root: preus-
- Indo-European root: prī-
- Indo-European root: pā-
- Indo-European root: pāl-
- Indo-European root: pē(i)-
- Indo-European root: pō(i)-
- Indo-European root: pū̆-
- Indo-European root: pəter-