UNCURL
uncurl
(verb) move out of a curled position; “He uncurled himself”
Source: WordNet® 3.1
Etymology
Verb
uncurl (third-person singular simple present uncurls, present participle uncurling, simple past and past participle uncurled)
(transitive, intransitive) To straighten out from being curled up.
Source: Wiktionary
Un*curl", v. t. Etym: [1st pref. un- + curl.]
Definition: 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.
Definition: To become uncurled, or straight.
Source: Webster’s Unabridged Dictionary 1913 Edition