harass (v.)
1610s, "to lay waste, devastate" (obsolete); 1620s, "to vex by repeated attacks," from French harasser "tire out, vex" (16c.), which is of uncertain origin; possibly from Old French harer "stir up, provoke; set a dog on," and perhaps blended with Old French harier "to harry, draw, drag" [Barnhart]. Related: Harassed; harassing.