dauntless (adj.)

c. 1300, "to vanquish, subdue, conquer," from Old French danter, variant of donter (12c., Modern French dompter) "be afraid of, fear, doubt; control, restrain," from Latin domitare, frequentative of domare "to tame" (see tame (v.)). Sense of "to intimidate, subdue the courage of" is from late 15c. Related: Daunted; daunting.