pre·pos·ter·ous 
/prɪˈpɑ:stərəs/ adjective
/prɪˈpɑ:stərəs/ adjective : very foolish or silly
▪ a preposterous excuse ▪ The whole idea is preposterous!
▪ a preposterous excuse ▪ The whole idea is preposterous!
— pre·pos·ter·ous·ly adverb
▪ The prices are preposterously [=absurdly] high.
▪ The prices are preposterously [=absurdly] high.
— pre·pos·ter·ous·ness noun [noncount]
▪ She laughed at the preposterousness [=absurdity] of my suggestion.
▪ She laughed at the preposterousness [=absurdity] of my suggestion.
