scorch (v.) Look up scorch at Dictionary.com
c.1200, perhaps from Old Norse skorpna "to be shriveled," cognate with Old English scrimman "to shrink, dry up." Or perhaps from Old French escorchier "to strip off the skin," from Vulgar Latin excorticare "to flay," from ex- + Latin cortex (genitive corticis) "cork;" but OED finds this not likely. Scorched earth military strategy is 1937, translation of Chinese jiaotu, used against the Japanese in their advance into China.