FOOLPROOF


Meaning of FOOLPROOF in English

/ ˈfuːlpruːf; NAmE / adjective

( of a plan, machine, method, etc. ) very well designed and easy to use so that it cannot fail and you cannot use it wrongly

SYN infallible :

This recipe is foolproof—it works every time.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.