ON / UNDER PAIN OF STH


Meaning of ON / UNDER PAIN OF STH in English

( formal ) with the threat of having sth done to you as a punishment if you do not obey :

They were required to cut pollution levels, on pain of a £10 000 fine if they disobeyed.

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