English sang froid, aplomb, sangfroid, composure, cool, coolness, imperturbability, poise, self control, self possession, unflappability
English backbone, decision, firmness, fortitude, spinal column, spine, vertebral column, anchor, cervical spine, grit, gumption, guts, moxie, sand, skeleton
Spanish agallas, coraje, discernimiento, nervio, red troncal, sangre fría, valor