胆 - gall bladder, courage, pluck

discouragement; despondency; dejection; disappointment

bold; daring; audacious

ulterior motive; plot; scheme

gallstone

blue vitriol; chalcanthite

firstly vision, secondly footwork, thirdly courage, fourthly technique (the most important aspects of kendo)

whitish gentian (Gentiana algida)

boldness; fearlessness

courage; nerve; grit

being as bold as a lion

the liver and gall bladder; one's inner being

courage; guts; nerves of steel