Refers to inner strength, fortitude, or boldness in facing difficulty or danger. Often used in contexts requiring mental toughness.
He has the courage to face any difficulty.
That decision required considerable nerve.
Compound of 胆 (たん, 'gallbladder; spirit') and 力 (りょく, 'power; strength'). The gallbladder was traditionally associated with courage in East Asian medicine, giving the sense of 'inner fortitude'.