骚扰
sāorǎo · HSK 7
harass
骚 sāo (disturb) + 扰 rǎo (disturb) = two disturb-words stacked into to harass
Both characters already mean to bother or disturb, so pairing them doubles the force into persistent harassment. The sound sāorǎo can also hook to a sour row, a nagging quarrel that will not stop.