un·curl /ˌʌnˈkɚ/
(v.)弄直卷著東西;使變直
Un·curl v. t. To loose from curls, or ringlets; to straighten out, as anything curled or curly.
He sheaths his paw, uncurls his angry mane. --Dryden.
Un·curl, v. i. To become uncurled, or straight.
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uncurl
v : move out of a curled position; "He uncurled himself"