とろうお 徒労に終わる Show inflections LinksSentence search for 徒労に終わるSentence search for とろうにおわるKanji details for 徒, 労 and 終Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending1. to end in vain; to be wasted effort Discussions Log in to talk about this word.