The fixed, firm part of a body, which supports it or gives it strength and solidity; as, the bones are the stamina of animal bodies; the ligneous parts of trees are the stamina which constitute their strength.
Whatever constitutes the principal strength or support of anything; power of endurance; backbone; vigor; as, the stamina of a constitution or of life; the stamina of a State.
As an actor, there is room for a certain amount of creativity, but you're always ultimately going to be saying somebody else's words. I don't think I'd have the stamina, skill or ability to write a novel, but I'd love to write short stories and poetry, because those are my two passions. Daniel Radcliffe