propriety

n.正当行为；正当；适当

propitious, propitiously, proponent, proportion, proportional, proportional representation, proportionally, proportionate, proportionately, proportioned, proportions, proposal, propose, proposer, proposition, propound, proprietary, proprietor, proprietorial, proprietorship, propulsion, propulsive, prorogation, prorogue, prosaic, prosaically, proscenium, proscenium arch, proscribe, proscription, prose, prosecute, prosecution, prosecutor, proselyte, proselytize, proselytize, proselytise, prosily, prosiness, prosodic,