胆大心小 たんだいしんしょう Meanings Expression being bold and courageous, but also careful and meticulous Kanji 胆 gall. Read as タン. 大 big. Read as ダイ. 心 heart. Read as シン. 小 small. Read as ショウ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists