Describes a facial expression that shows disapproval or disgust.
Al ver su arremueco, supe que no estaba de acuerdo con lo que decía.
Seeing his grimace, I knew he didn't agree with what he was saying.
Al ver el desastre, no pude evitar hacer un arremueco de desagrado.
Seeing the disaster, I couldn't help but make a grimace of displeasure.