What is formidable; dread; terrible to foes; as, a redoubtable hero; hence, valiant; -- often in contempt or burlesque. [Written also redoutable.] called?

redoubtable — Formidable; dread; terrible to foes; as, a redoubtable hero; hence, valiant; -- often in contempt or burlesque. [Written also redoutable.]. (Webster's 1913.)