[per.qui.site] n [ME, property acquired by means other than inheritance, fr. ML perquisitum, fr. neut. of perquisitus, pp. of perquirere to purchase, acquire, fr. L, to search for thoroughly, fr. per- thoroughly + quaerere to seek] (15c) 1: a privilege, gain, or profit incidental to regular salary or wages; esp: one expected or promised
2: gratuity, tip
3: something held or claimed as an exclusive right or possession "concepts ... not the ~s of any particular groups --Gilbert Ryle"