1. A bit for enlarging the upper part of a hole
   - counterbore, countersink

Derived forms: countersink bits

Type of: bit

• affiliation
• affinal
• affine
• affine geometry
• affine transformation
• affined
• affinity
• affirm
• affirmable
• affirmation
• affirmative
• affirmative action
• affirmative pleading
• affirmatively
• affirmativeness
• affirmatory
• Affirmed
• affirmer
• affix
• affixal
• affixation
• affixed
• affixial
• afflatus
• afflict