To weaken someone's morale over a long period.
To make something hard smaller and smoother by gradually rubbing off tiny bits, to wear down.
To harass with importunity; to pursue with persistent solicitations; to annoy.
To kill many of one species of animal, with the intent of removing them from human habitats.
To pursue in a manner to do harm or cruelty to; especially, because of the victim's race, sexual identity, or adherence to a particular belief.