grimace

US /ˈɡrɪm.əs/
UK /ˈɡrɪm.əs/
"grimace" picture
1.

an ugly, twisted expression on a person's face, typically expressing disgust, pain, or wry amusement

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He made a grimace of pain when he twisted his ankle.
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Her smile was more of a grimace than genuine amusement.
:
frownscowlpoutsmirkwry face
1.

make a grimace

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He grimaced at the bitter taste of the medicine.
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She grimaced as the dentist began the procedure.
:
frownscowlpoutsmirkpull a face