/,ʌn'fɪt; ʌn`fɪt/
adj
1 ~ (for sth/to do sth)
(a) not of the required standard; unsuitable 不合格的; 不适宜的
*food unfit for human consumption 人不能吃的食物
* houses unfit for people to live in 不适合居住的房屋.
(b) lacking the ability needed; incapable 不胜任的; 无能力的
*She is unfit for such a senior position. 她不胜任这种高级职务.
* He is unfit to drive in his present state, eg because he is drunk. 他现在这样不能开车（如因喝醉了酒）.
2 not perfectly healthy and fit 不太健康的; 不太健壮的
*The army rejected him as medically unfit. 他因体检不合格而未能入伍.

adj
not in a good physical condition
= out of shape
　She never gets any exercise - she must be really unfit.
not good enough to do something or to be used for a particular purpose
unfit for
　Jenkins is unfit for public office.
　The meat was declared unfit for human consumption (=not suitable to eat) .
　The house was unfit for human habitation (=not good enough to live in) .
unfit to do sth
　Hubbard was declared mentally unfit to stand trial.