1701, parloi, a term in the card game faro involving applying money won to a continuing bet, from French paroli, from Italian parole (Neapolitan paroli) "words, promises," plural of parolo (see parole (n.)). Verbal meaning "exploit to advantage" is by 1942.
parking
Parkinson's disease
Parkinson's Law
parkland
parlance
parlay
parley
parleyvoo
parliament
parliamentarian
parliamentary