甲斐 がい Meanings Suffix result (that makes an act worthwhile); worth (in doing something); value; effect; use; benefit; avail (after a noun or the -masu stem of a verb) See also: 甲斐 (かい). Kanji 甲 armor 斐 beautiful; patterned. Read as イ. Words containing 甲斐 不甲斐ない (ふがいない) good-for-nothing 年甲斐 (としがい) one's age 甲斐甲斐しい (かいがいしい) brisk and efficient And 7 more. Jinuma: Japanese Dictionary · Word lists