COG

I. noun Etymology: Middle English ~ge, of Scandinavian origin; akin to Swedish kugge ~ Date: 13th century a tooth on the rim of a wheel or gear, a subordinate but integral person or part, ~ged adjective II. verb (~ged; ~ging) Etymology: obsolete ~ a trick Date: 1532 intransitive verb to cheat in throwing dice, deceive , to use venal flattery, transitive verb to direct the fall of (dice) fraudulently, wheedle , III. transitive verb (~ged; ~ging) Etymology: probably alteration of cock to ~ Date: 1823 to connect (as timbers or joists) by means of mortises and tenons, IV. noun Date: 1830 a tenon on a beam or timber, V. abbreviation ~nate