grimace



MEANING :
1. (n.) a distorted facial expression often indicating discomfort, pain, disgust etc.
2. (v.) to make distorted facial expressions
USAGE EXAMPLE 1:
The thought of entering the dark, filthy alley made him grimace.
USAGE EXAMPLE 2:
They found changes in facial expression, including a grimace, squeezing eyes shut and furrowing the brow, were best indicators the baby was in pain.