Sensible Vocabulary: associated words and phrases Certainty (as) crystal clear as working day idiom (as) positive as eggs is eggs idiom and that is flat! idiom assure anyone of anything confident decidedly deffo definite unquestionably definitive inviolably ironclad irrefutable irrefutably make no slip-up (about it) idiom unquestionably unreserved unreservedly watertight https://mariohysgs.wikigdia.com/6402648/rent_no_further_a_mystery