knuckle

Nouns

(n) a joint of a finger when the fist is closed knuckle joint, metacarpophalangeal joint,

Verbs

(v) press or rub with the knuckles
(v) shoot a marble while keeping one's knuckles on the ground

Synonyms

knuckle joint metacarpophalangeal joint

Words of close approximity

knucks

knuckleball knucklebones knuckle down knuckle duster knucklehead knuckle joint knuckler knuckles knuckle under