scrunch up

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Verb
1. sit on one's heels; "In some cultures, the women give birth while squatting"; "The children hunkered down to protect themselves from the sandstorm"
(synonym) squat, crouch, scrunch, hunker, hunker down
(hypernym) sit, sit down
2. make wrinkles or creases into a smooth surface; "The dress got wrinkled"
(synonym) wrinkle, ruckle, crease, crinkle, scrunch, crisp
(hypernym) fold, fold up, turn up
(hyponym) pucker, rumple, cockle, crumple, knit