Etymology Chink

The Barnhart Concise Dictionary of Etymology

n. 1535 perhaps an altered version of chine (before 1382); found in
chin, chine, cleft, split, crack, Old English (about 888) cinu, related
to cinan to crack, split, gape; cognate with Old Saxon and Old High
German kinan to burst open, spout, Gothic uskeinan to sprout out, and
Old High German kimo sprout (modern German Keim, germ, bud, sprout). v.
1552, to crack, later, in American English, to fill in cracks (1748).

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