precarious

adj.不确定的；危险的

pre-existent, pre-heat, pre-natal, pre-ordain, pre-package, Pre-Raphaelite, pre-record, pre-recorded, pre-school, pre-set, pre-shrunk, pre-stressed, pre-tax, pre-war, preach, preacher, preachy, preamble, prebend, prebendary, precariously, precariousness, precaution, precautionary, precede, precedence, precedent, precedented, preceding, precentor, precept, preceptor, precession, precinct, preciosity, precious, preciously, preciousness, precipice, precipitant,