Abatement

[Tanya Shivari]

The act of abating, or the state of being abated; a
lessening, diminution, or reduction; removal or putting an end to; as,
the abatement of a nuisance is the suppression thereof.

[Merna]

Abatement is a reduction in the level of taxation faced by an individual or company.

[Agnes]

The action of abating or being abated; ending or subsiding.

[Tariq Zaki]

(often in legal use) the ending, reduction, or lessening of something.