indecorous

adj.

1. 令人难堪的；不得体的；不适当的
   embarrassing or not socially acceptable

1. Do not bring into the Hall or exhibit any advertising materials, illegal substance, combustible materials, damaged materials and anesthetic or indecorous matter.
   除非预先获得学生事务处特别安排，切勿将任何宣传物料、易燃物品、非法物品、危险品及不雅污秽物品带进宿舍或在宿舍内展示。
2. She could not ignore his indecorous behavior though she loved him very much.
   尽管她非常爱他却无法忽视他那有失体统的行为。
3. He felt that there was something indecorous in her proposal.
   他觉得她的打算有点不恰当。
4. In the society in which he thought courtesy was broken and righteousness ruined, Confucius said loudly "NO" to all phenomena of violations of righteousness and indecorous behaviours.
   在他认为的礼乐崩坏仁义沦丧的社会，孔子对一切“违仁”“非礼”的现象和言行，大声说“不”。

adj

1. lacking propriety and good taste in manners and conduct
   1. indecorous behavior

   Synonym:    indelicate

2. not in keeping with accepted standards of what is right or proper in polite society
   1. was buried with indecent haste
   2. indecorous behavior
   3. language unbecoming to a lady
   4. unseemly to use profanity
   5. moved to curb their untoward ribaldry

   Synonym:    indecentunbecominguncomelyunseemlyuntoward