lay a finger on

== English == === Etymology === From Middle English fynger on (hem) to leyn (“touch (someone) with hostile intent”). === Pronunciation === === Verb === lay a finger on (third-person singular simple present lays a finger on, present participle laying a finger on, simple past and past participle laid a finger on) (idiomatic, colloquial) To merely touch. Used other than figuratively or idiomatically: see lay,‎ a,‎ finger,‎ on: to finger