失望落胆 しつぼうらくたん Meanings Noun, する verb being disappointed and disheartened Kanji 失 lose. Read as シツ. 望 hope. Read as ボウ. 落 fall. Read as ラク. 胆 gall. Read as タン. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists