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countersink Etymology Atlas
to bevel a hole so a screw head sits flush with the surface Pro
Word
Root
Affix
Tap any word to open its Atlas. Pinch to zoom, drag to pan.
countersink is a Level C2+ word — Pro only
Pro unlocks the Etymology Atlas for levels A2–C2 — plus FSRS-5 spaced repetition, mastery tracking, and the activity dashboard.