防不胜防

you can't guard against it (idiom) / impossible to defend effectively / not much one can do about it / It can't be prevented.

to protect / to defend / to guard against / to prevent

no; not so / (bound form) not; un-

cannot bear or stand / be unequal to / very / extremely

victory / success / to beat / to defeat / to surpass / victorious / superior to / to get the better of / better than / surpassing / superb (of vista) / beautiful (scenery) / wonderful (view) / (Taiwan pr. [sheng1]) able to bear / equal to (a task)