Hone
HONE, noun A stone of a fine grit, used for sharpening instruments that require a fine edge, and particularly for setting razors. [We never, I believe, call a hone a whet-stone. The latter is a stone of coarse grit. See the word.]
HONE, verb transitive To rub and sharpen on a bone; as, to hone a razor.
HONE, verb intransitive To pine; to long.