Abate

annullare

(to make (a writ or other legal document) void — see also nullify)

calare

(to reduce (something) in amount or size)

eliminare

(to make (a writ or other legal document) void — see also nullify)

estinguere

(to make (a writ or other legal document) void — see also nullify)

ridurre

(to reduce (something) in amount or size)

ridursi

((intransitive) to decrease in amount or size)