かい 甲斐なし LinksSentence search for 甲斐なしSentence search for かいなしSentence search for 甲斐無しKanji details for 甲 and 斐Edit in JMdict Noun1. worthlessness; uselessness; hopelessnessOther forms甲斐無し 【かいなし】 Discussions Log in to talk about this word.