"You canker blossom!" 3 Shakespearean Insults
Old English (be)clencan "to hold fast, make cling," causative of clingan (see cling); cf. stench/stink. Related: Clenched; clenching.
"part of a nail that clinchers," 1590s, from clench (v.). Meaning "a grasp, grip" is from 1779.