a. not suitable for a particular occasion etc
s. not in keeping with what is correct or proper
a. 不适当的, 不相称的
1. It is inappropriate to talk loudly in the library.
在图书馆大声说话是不合适的。
2. His comments during the meeting were considered inappropriate.
他在会议上的评论被认为是不恰当的。
3. Wearing shorts to a formal event is generally seen as inappropriate.
在正式活动中穿短裤通常被视为不合适。