completely unreasonable, especially in a way that shocks or annoys you 荒唐的；極不合情理的 unusual in a way that is silly or that shocks you 怪誕的；離奇古怪的
Word Originmid 16th cent.: from Latin praeposterus ‘reversed, absurd’ (from prae ‘before’ + posterus ‘coming after’) + -ous.