squinch
To scrunch up (one's face, etc.).
transitive
The president squinched his face and bit his lip and seemed too antsy to stand still.
Where it comes from
Uncertain. Probably blend of squint + pinch. Compare squink-eyed, variant of squint-eyed, so perhaps it is at least partly an altered form of squint.
Adapted from the Wiktionary entry squinch (CC BY-SA 4.0).