unsuitable

adj. /ʌnˈsuːtəbl/ B2

不合适的；不适宜的

Not acceptable, right, or appropriate for a particular purpose.

仙境例句

Butter is quite unsuitable for a watch, as the March Hare soon found out.

黄油可一点都不适合抹在表上，三月兔很快就发现了。