countersunk

[v., n. koun-ter-singk; v. also -koun-ter-singk]

coun·ter·sink

[v., n. koun-ter-singk; v. also -koun-ter-singk] verb, coun·ter·sank, coun·ter·sunk, coun·ter·sink·ing, noun
verb (used with object)
1.
to enlarge the upper part of (a cavity), especially by chamfering, to receive the cone-shaped head of a screw, bolt, etc.
2.
to cause (the head of a screw, bolt, etc.) to sink into a prepared depression so as to be flush with or below the surface.
noun
3.
a tool for countersinking a hole.
4.
a countersunk hole.

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Countersunk is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

Origin:
1810–20; counter- + sink
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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