Dictionary/恩知らずおんしらずOnshirazu恩知らず (Onshirazu) is a Japanese adjectival noun meaning “ungrateful”.Meaningsadjectival noun, na-adjective, nounungratefulKanji in 恩知らず恩grace知knowRelated words知るto knowかも知れないmayかも知れませんmay知り合うto get to know each otherご存知knowing知れるto become known承知knowledgeかも知れんmay知識knowledge知恵wisdom未知not yet known恩人benefactor