1) 役立やくだつ Parts 役 立つ #5,592 Inflections of 役立つ Class Godan verb Stem Inflected ending ✕ Link copied! Common N1 やくだつ [3] Meaning Shirabe Godan verb Intransitive verb to be useful; to be helpful; to serve the purpose 英語えいごは商業しょうぎょうにおいて役立やくだつ。 English is useful in commerce. Kanji 役 ヤク duty, war, campaign 立 リツ stand up, rise, set up Forms 役立つ#5,592役立やくだつ役だつ#54,555役やくだつやくだつやくだつ