(ぱい)

ぱい
noun
mahjong tile
leisure
1. mahjong tile; tile
A playing piece used in mahjong. A standard set contains 136 tiles divided into suits (萬子, 筒子, 索子) and honor tiles (字牌). Also written as 牌 in other tile-based games.
(ぱい)()
To discard a tile.
Shuffle the tiles and then deal them.
Choose an unnecessary tile from your hand and discard it.

In mahjong terminology, (ぱい) appears in many compounds: 手牌(てはい) (tiles in one's hand), 字牌(じはい)/つーぱい (honor tiles), 萬子(まんず)/筒子(ぴんず)/索子(そーず) (the three number suits). Key verbs used with tiles: (ぱい)() (to discard), (ぱい)() (to draw), (ぱい)() (to call a discarded tile). Mahjong is extremely popular in Japan both as a social game and as a subject of manga and anime.