汉语翻译：
a. 不适当的, 不相称的英语解释：
动词 unfit:

make unfit or unsuitable同义词：disqualify, unfit, indispose

形容词 unfitting:

not in keeping with what is correct or proper同义词：inappropriate, incompatible, out or keeping

例句：

He was so unfit he couldn't keep pace (with us).他身体很不好，跟不上(我们).

She is unfit for such a senior position.她不胜任这种高级职务。

She was unfit for such a senior position.她不能胜任这样的高级职位。

The water is unfit for drinking.这水不宜饮用。