inappropriate/ ɪnə'prəuprɪət /

1.adjective
(unsuitable) 不适当的

2.adjective [+remark] [ behaviour] 
(improper) 不相宜的

it would be inappropriate to comment
进行评论将是不恰当的
it would be inappropriate for me to interfere
我干涉将是不恰当的
to be inappropriate to sth
对某事不相宜