胆 - gall bladder, courage, pluck

discouragement; despondency; dejection; disappointment

gallstone

bold; daring; audacious

ulterior motive; plot; scheme

bile acid

bile duct

bile duct

gallbladder; liver

heart

green sea urchin (Hemicentrotus pulcherrimus)

Japan Biliary Association

going through thick and thin to attain one's objective; enduring unspeakable hardships for the sake of vengeance