c. 1200, "to be very hot; to afflict painfully with hot liquid or steam," from Old North French escalder "to scald, to scorch" (Old French eschalder "heat, boil up, bubble," Modern French échauder), from Late Latin excaldare "bathe in hot water" (source also of Spanish escaldar, Italian scaldare "heat with hot water"), from Latin ex "out, out of" (see ex-) + calidus "hot" (from PIE root *kele- (1) "warm"). Related: Scalded; scalding. The noun is c. 1600, from the verb.