This is the 952nd most frequent German word.
reduzieren
To reduce or decrease.
used in the present tense, describing a repeated action of lowering the intensity of volume
Er reduziert immer die Lautstärke, wenn er telefoniert.
He always reduces the volume when he makes phone calls.
used as an infinitive to describe the act of lessening something specific, in this case, expenses.
Ich möchte meine Ausgaben reduzieren.
I want to reduce my expenses.
used as the past participle in perfect tense, indicating an action of lowering or cutting back.