IRONCLAD


Meaning of IRONCLAD in English

also iron-clad

If you describe a guarantee or plan as ~, you are emphasizing that it has been carefully put together, and that you think it is absolutely certain to work or be successful.

...~ guarantees of safe passage...

ADJ emphasis

Collins COBUILD.      Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) .