SMART Vocabulary: relevant phrases and phrases Certainty (as) crystal clear as day idiom (as) confident as eggs is eggs idiom and that is flat! idiom assure anyone of one thing confident decidedly deffo definite undoubtedly definitive inviolably ironclad irrefutable irrefutably make no oversight (about it) idiom unquestionably unreserved unreservedly watertight https://brno43086.blogoxo.com/28247490/apartment-things-to-know-before-you-buy