flinch (v.) Look up flinch at Dictionary.com
1570s, from obsolete flecche "to bend, flinch," probably from Old French flenchir "to bend," probably from Frankish *hlankjan or some other Germanic source (cognates: Middle High German linken, German lenken "to bend, turn, lead"), from PIE root *kleng- "to bend, turn" (see link (n.)). Related: Flinched; flinching. As a noun, from 1817.