countersink چگونه تلفظ می‌شود

ترجمه‌ی countersink

تعریفِ countersink

• a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface
• a bit for enlarging the upper part of a hole
• insert (a nail or screw below the surface, as into a countersink)