grimace

noun
UK /ˈɡrɪm.əs/
US /ˈɡrɪm.əs/

A funny or unhappy look on your face that shows you do not like something.

She made a grimace when she tasted the sour lemon.


OTHER MEANINGS

2. To twist your face to show pain, disgust, or dislike.

He grimaced as the doctor cleaned the cut on his knee.

3. A twisted expression of pain or effort.

A grimace of effort crossed her face as she lifted the heavy box.

4. To smile in an awkward or forced way.

She grimaced a polite smile at the boring joke.