noun
inefficient tile shape; shape that accepts few winning tiles
Mahjong term for a hand shape that is difficult to complete because it can only accept a limited number of tiles to win.
愚形を避けて、受け入れの広い形を作るのが基本だ。
It's fundamental to avoid inefficient shapes and build shapes that accept many tiles.
この待ちは愚形だから、リーチをかけても和了りにくい。
This wait is an inefficient shape, so even if you declare riichi, it's hard to win.