(mahjong) to win

(mahjong) a 役 (yaku, “winning hand”) in which every meld consists of at least an open 刻子 (kōtsu, “pung”), worth 2 翻 (han, “doubles”)

Japanese-style scissors

(offensive, Internet slang) Alternative form of 子供部屋おじさん

(offensive, Internet slang) a man whose age is greater than about thirty or forty who lives in one's child room and with one's parent(s).

single room

double room

Kyūjitai form of 水蒸気: steam; water vapor

Kyūjitai form of 気候学: climatology

Kyūjitai form of 気象学 (“meteorology”)