pull your punches
US /pʊl jʊər ˈpʌn.tʃɪz/
UK /pʊl jʊər ˈpʌn.tʃɪz/

1.
手下留情, 有所保留, 不盡力
to hold back or limit the force of one's criticism or actions
:
•
The reviewer didn't pull any punches, criticizing every aspect of the film.
評論家沒有手下留情,批評了電影的每一個方面。
•
You need to tell him the truth; don't pull your punches.
你需要告訴他真相;不要手下留情。