かいがい 甲斐甲斐しい Show inflections LinksSentence search for 甲斐甲斐しいSentence search for かいがいしいKanji details for 甲 and 斐Edit in JMdict I-adjective (keiyoushi)1. brisk and efficient; diligent; devoted; spiritedUsually written using kana alone Discussions Log in to talk about this word.