to reduce or remove a nuisance (=something that causes harm or annoyance to a person or to property)
Tenant will immediately abate any nuisance or said other act or omission upon demand of Landlord.
to gradually become less intense, serious, widespread, or extreme
The hurricane finally abated.
to nullify, cancel, quash, or demolish something
They filed a motion to abate a lawsuit brought by a their former colleague.