Spunk

Part of speech: noun (n.)

1. Wood that readily takes fire; touchwood; also, a kind of tinder made from a species of fungus; punk; amadou. Sir T. Browne.

2. An inflammable temper; spirit; mettle; pluck; as, a man of spunk. [Colloq.] A lawless and dangerous set, men of spunk, and spirit, and power, both of mind and body. Prof. Wilson.