Something that is ~ is very effective and powerful.
Their most ~ weapon was the Exocet missile...
The drug is extremely ~, but causes unpleasant side effects.
= powerful
ADJ
Something that is ~ is very effective and powerful.
Their most ~ weapon was the Exocet missile...
The drug is extremely ~, but causes unpleasant side effects.
= powerful
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012