adj. Not yet blooded; still to take part in combat.
The Century Dictionary and Cyclopedia
Not marked or distinguished by improved blood; not thoroughbred: as, an unblooded horse.
Word Usage
"Sharpe shouted again, his sword unblooded, and the two ranks stepped and stumbled over the dead bodies of the French, past the wounded who cried for help, and the joy was on Sharpe for now he was within a few seconds of this first success."