wince
verb [ I ] uk/wɪns/ us/wɪns/
（因疼痛而）脸部肌肉抽搐，皱眉蹙额
to show pain suddenly and for a short time in the face, often moving the head back at the same time
Did I hurt you? - I thought I saw you wince. 我弄疼你了吗？——好像看到你皱了一下眉。
It makes me wince even thinking about eye operations. 一想到眼部手术，我就不由得眉头一皱。