hard on somebody

Từ điển Oxford Advanced Learner 8th

be ˈhard on sb/sth idiom
1. to treat or criticize sb in a very severe or strict way
• Don't be too hard on him— he's very young.
2. to be difficult for or unfair to sb/sth
• It's hard on people who don't have a car.
3. to be likely to hurt or damage sth
• Looking at a computer screen all day can be very hard on the eyes.
Main entry: ↑hard_idiom