(n): any instrument or instrumentality used in fighting or hunting
(n): a joint of a finger when the fist is closed
(n): a joint so articulated as to move freely
knuckle
(v): press or rub with the knuckles
(v): exert pressure or force to or upon
(v): shoot a marble while keeping one's knuckles on the ground
(v): throw or propel in a specific direction or towards a specific objective