大胆

brazen / audacious / outrageous / bold / daring / fearless

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

gall bladder / courage / guts / gall / inner container (e.g. bladder of a football, inner container of a thermos)