(grimaces, grimacing, grimaced)
If you grimace, you twist your face in an ugly way because you are annoyed, disgusted, or in pain. (WRITTEN)
She started to sit up, grimaced, and sank back weakly against the pillow...
She grimaced at Cerezzi, then turned to Brenda.
VERB: V, V at n
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Grimace is also a noun.
He took another drink of his coffee. 'Awful,' he said with a grimace.
N-COUNT