Final answer:
A grimace is a facial expression that indicates discomfort or disgust. A synonym for grimace is frown.
Step-by-step explanation:
A grimace is a facial expression that typically indicates discomfort, pain, or disgust. It is often characterized by a tightening of the facial muscles, usually resulting in a contorted or twisted expression. A synonym for grimace is frown. When someone frowns, they bring their eyebrows together and wrinkle their forehead, indicating displeasure or sadness.