Countersunk :: Countersunk (p. p. & a.) Chamfered at the top; -- said of a hole.
Countersunk :: Countersunk (p. p. & a.) Sunk into a chamfer; as, a countersunk bolt..
Countersunk :: Countersunk (p. p. & a.) Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead..
Sunk :: Sunglow (n.) A rosy flush in the sky seen after sunset.