破顔一笑 はがんいっしょう Meanings Noun, する verb, Intransitive smiling broadly Kanji 破 break. Read as ハ. 顔 face. Read as ガン. 一 one. Read as イチ. 笑 laugh. Read as ショウ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists