pester, molest, hassle, provoke, heckle, chivvy, harry, beleaguer, plague, oppress, more...

support, defend, protect

sexual harassment, racial harassment, bullying, more...

sexual, dreadful, constant, further, present, pecuniary, last, mental, great, incessant, best

pester no end,   bother or disturb,   pester effectively,   give a hard time to,   pester aggressively,   pester unmercifully,   to torment,   pesters incessantly,   to bully,   pesters constantly