Noah Webster
Knuckle
KNUCK'LE, noun nuk'l.
1. The joint of a finger, particularly when protuberant by the closing of the fingers.
2. The knee join of a calf; as a knuckle of veal.
3. The joint of a plant. [Not used.]
KNUCK'LE, verb intransitive nuk'l. To yield; to submit in contest to an antagonist.