(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”)

bilingual book; a book with translations printed side by side or on opposite pages

(geometry) opposite angle - in the quadrangles, the angle that is not the neighbour to an angle.

(physics) annihilation

(physics) undergo annihilation

In a shindenzukuri style building, the secondary building located to the west of the main shinden. The western pavilion.

antihero

Short for 反社会的勢力 (“antisocial force”).

(mathematics) an inverse proportion, a reciprocal ratio

(mathematics) to be in inverse ratio, to be inversely proportional