cinch
1. cinch \'sinch\ n [Sp cincah, fr. L cingula girdle, girth, fr. cingere] 1: a strong girth for a pack or saddle 2: a tight grip 3a: a thing done with ease 3b: a certainty to happen 2. cinch vt 1: to put a cinch on 2: to make certain : ASSURE
Webster's English Dictionary1. cinch \'sinch\ n [Sp cincah, fr. L cingula girdle, girth, fr. cingere] 1: a strong girth for a pack or saddle 2: a tight grip 3a: a thing done with ease 3b: a certainty to happen 2. cinch vt 1: to put a cinch on 2: to make certain : ASSURE