mid-15c., "not true," from French impropre (14c.), from Latin improprius, from assimilated form of in- "not, opposite of" (see in- (1)) + proprius (see proper). Meaning "not suited, unfit" is from 1560s; that of "not in accordance with good manners, modesty, decency" is from 1739. Related: Improperly (late 14c.).
双语例句
1. He would never be improper, he is always the perfect gentleman.
他总是举止得体，一直是个完美的绅士。
来自柯林斯例句
2. Mr Matthews maintained that he had done nothing improper.
马修斯先生坚称他没有做过非法的事情。
来自柯林斯例句
3. It's considered improper to be unclothed in public.
在公共场合赤身裸体被认为是不成体统的。
来自柯林斯例句
4. The committee concluded that the senators had engaged in improper conduct.
委员会断定议员们从事了不正当活动.
来自《简明英汉词典》
5. He was very indignant with his wife over her improper conduct.
