Intelligent Vocabulary: relevant words and phrases Certainty (as) obvious as working day idiom (as) sure as eggs is eggs idiom and that's flat! idiom assure another person of one thing confident decidedly deffo definite undoubtedly definitive inviolably ironclad irrefutable irrefutably make no slip-up (over it) idiom unquestionably unreserved unreservedly watertight https://lorenzoukexr.bloggosite.com/34578998/what-does-rent-mean