(kog) noun
1. Mech. A tooth or one of a series of teeth projecting from the surface of a wheel or gear to impart or receive motion.
2. A tenon on a joist or beam to fit a mortise on another.
3. A person regarded as making a minor or insignificant contribution to the working of a large organization or process. [<Scand. Cf. Sw. kugge cog.]

(kog) v. cogged, cog·ging v.t.
1. To load or mishandle, as dice, in order to cheat.
2. Obs. To mislead or deceive.
—v.i.
3. To cheat, as with loaded dice.
—noun A trick; imposition; a lie. [Origin unknown]

(kog, kōg) noun
1. A small rowboat or fishing vessel; cockboat.
2. Formerly, a broadly built transport or other vessel: also spelled cogue. [<OF cogue]