kō-

To sharpen, whet. Oldest form *k̑eə₃-, colored to *k̑oə₃-, contracted to *k̑ō- (becoming *kō- in centum languages).

1. Suffixed extended form *koəi-no-. hone¹, from Old English hān, stone, from Germanic *hainō.

2. Possibly Greek kōnos, cone, conical object (< “a sharp-pointed object”): cone, conic; conifer, conodont.

 

[Pokorny k̑ē(i)- 541.]

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