cut down

Từ điển Oxford Advanced Learner 8th

ˌcut sthˈdown (to…) | ˌcut ˈdown (on sth) derived
to reduce the size, amount or number of sth
•We need to cut the article down to 1 000 words.
•The doctor told him to cut down on his drinking.
•I won't have a cigarette, thanks— I'm trying to cut down (= smoke fewer).
Main entry: ↑cut_derived