uncurl

From un- +‎ curl.

uncurl (third-person singular simple present uncurls, present participle uncurling, simple past and past participle uncurled)

1. (transitive, intransitive) To straighten out from being curled up.

   The hedgehog uncurled when its predators had left.

   • 1687, John Dryden, The Hind and the Panther:

     But when his foe lyes prostrate on the plain,
     He sheaths his paws, uncurls his angry mane;
     And, pleas'd with bloudless honours of the day,
     Walks over, and disdains th' inglorious Prey.

   • 1902, Rudyard Kipling, “The Elephant's Child”, in Just So Stories:

     Then he uncurled his trunk and knocked two of his dear brothers head over heels.