形容詞 inappropriate:

1. not suitable for a particular occasion etc
2. not in keeping with what is correct or proper
   同義詞：incompatible, out or keeping, unfitting

1. Not apt or fitting; inappropriate.
   不合適的不恰當(dāng)?shù)幕虿缓线m的; 不合宜的
2. Lightness of manner or speech, especially when inappropriate; frivolity.
   輕浮，輕率舉止或言談不嚴(yán)肅，尤指在不適當(dāng)?shù)膱?chǎng)合; 輕佻
3. Occurring or done at an inappropriate time; inopportune.
   不適當(dāng)?shù)脑谝粋€(gè)不適當(dāng)?shù)臅r(shí)候出現(xiàn)的或做的; 時(shí)間上不利的

in.ap.pro.pri.ate

adj.（形容詞）
Unsuitable or improper; not appropriate.
不合適或不適宜的；不恰當(dāng)?shù)?/br>
【引伸】
in.appro.priately
adv.（副詞）
in.appro.priateness
n.（名詞）