破顔大笑 はがんたいしょう Meanings Noun, する verb breaking into a hearty laugh Kanji 破 break. Read as ハ. 顔 face. Read as ガン. 大 big. Read as タイ. 笑 laugh. Read as ショウ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists