humiliate (v.)

1530s, a back-formation from humiliation or else from Late Latin humiliatus, past participle of humiliare "to humble," from humilis "lowly, humble," literally "on the ground," from humus "earth," from PIE root *dhghem- "earth." Earlier was humily "humble oneself" (mid-15c.), from Old French humilier. Related: Humiliated.