词根:propr, proper, propri = proper(适当的), one's own(自己
   词根来自拉丁语的propr 意为one's own。
   (*拉丁文proprius(=proper,own)——英文字根字典)
同源词:
1. propriety (自身所固有的性质propr(=one's own))
   n.(行为等的)得体;妥当;适当;礼貌;(pl.)礼仪,礼节
   proper adj. 合适的,妥当;有礼貌的;本身的
   properly adv.合适地;有礼貌地;彻底地
   proprietor n.所有者;经营者;房东
   proprietorship n.所有权《-ship = 抽象名词后缀》
   I question the propriety of his promoting his own son to V.P. at such an early age. 我怀疑他将自己如此年轻的儿子提升为副总裁是否妥当。
2. appropriate
   v.占用,挪用,盗用;拨出(款项等)
   adj.适合的,适当的 *ap < ad(=to,near)
   Don't appropriate other's ideas. 不要盗用别人的见解。
   appropriate $500,000 for the new school buildings 为建新校舍拨款50万美元
   The legislature appropriated the funds for the university.州议会为那所大学拨了款。
   Sports clothes are not appropriate for a formal wedding.运动服不适合正式的婚礼。
  
3. appropriation
   n.私用,挪用(资金);拨给的费用 *ap<ad(=to,near)
   make an appropriation for payment of debts 为了偿还债务而支出
4. expropriate
   v.没收(财产);征用(土地等的)使用权;夺取所有权 *ex(=out,away)
   expropriation n.没收;征用
5. impropriety
   n.不适当;不正当的行为;错误的词句《im- = in- =not》
6. misappropriate
   v.误用;侵占;盗用(不当地使用)《mis- = wrong》
   misappropriation n.误用;侵占;盗用