\Cog\, v. t. [imp. & p. p. {Cogged}; p. pr. & vb. n.
{Cogging}.] [Cf. W. coegio to make void, to beceive, from
coeg empty, vain, foolish. Cf. {Coax}, v. t.]
1. To seduce, or draw away, by adulation, artifice, or
   falsehood; to wheedle; to cozen; to cheat. [R.]
         I'll . . . cog their hearts from them. --Shak.
2. To obtrude or thrust in, by falsehood or deception; as, to
   cog in a word; to palm off. [R.]
         Fustian tragedies . . . have, by concerted
         applauses, been cogged upon the town for
         masterpieces.                         --J. Dennis
         To cog a die, to load so as to direct its fall; to
         cheat in playing dice.                --Swift.

\Cog\, v. i.
To deceive; to cheat; to play false; to lie; to wheedle; to
cajole.
      For guineas in other men's breeches, Your gamesters
      will palm and will cog.                  --Swift.

\Cog\, n.
A trick or deception; a falsehood. --Wm. Watson.

\Cog\, n. [Cf. Sw. kugge a cog, or W. cocos the cogs of a
wheel.]
1. (Mech.) A tooth, cam, or catch for imparting or receiving
   motion, as on a gear wheel, or a lifter or wiper on a
   shaft; originally, a separate piece of wood set in a
   mortise in the face of a wheel.
2. (Carp.)
   (a) A kind of tenon on the end of a joist, received into a
       notch in a bearing timber, and resting flush with its
       upper surface.
   (b) A tenon in a scarf joint; a coak. --Knight.
3. (Mining.) One of the rough pillars of stone or coal left
   to support the roof of a mine.

\Cog\, v. t.
To furnish with a cog or cogs.
{Cogged breath sound} (Auscultation), a form of interrupted
   respiration, in which the interruptions are very even,
   three or four to each inspiration. --Quain.

\Cog\, n. [OE. cogge; cf. D. kog, Icel. kuggr Cf. {Cock} a
boat.]
A small fishing boat. --Ham. Nav. Encyc.