preposterous

Universal Words adjective (formal) 1 completely unreasonable, especially in a way that is shocking or annoying SYNOUTRAGEOUS: These claims are absolutely preposterous! * It's preposterous to suggest that everything was her fault! 2 unusual in a silly or shocking way SYNOUTRAGEOUS: The band were famous for their preposterous clothes and haircuts. preposterously adverb: a preposterously expensive bottle of wine