clinch
1. clinch \'klinch\ vb [prob. alter. of 1clench] 1a: to turn over or flatten the protruding pointed end of (a driven nail); also : to treat (a screw, bolt, or rivet) in a similar way 1b: to fasten in this way 2: CLENCH 3: to make final or irrefutable : SETTLE 1: to hold an opponent (as in boxing) at close quarters with one or both a rms 2: to hold fast or firmly 2. clinch n 1: a fastening by means of a clinched nail, rivet, or bolt; also : the clinched part of a nail, bolt, or rivet archaic 2: PUN 3: an act or instance of clinching in boxing
Webster's English Dictionary