From Longman Dictionary of Contemporary Englishuncoilun‧coil /ʌnˈkɔɪl/ verb [intransitive, transitive] STRAIGHTif you uncoil something, or if it uncoils, it stretches out straight after being wound around in a circle SYN unwind Slowly, the snake uncoiled.→ See Verb table
Examples from the Corpus
uncoil• It's the first time in years I've been able to uncoil a little with Ali.• Granny Weatherwax lay in it, her dress torn, her hair uncoiling from its rock-hard bun.• They beckon us to claim our right to uncoil in a frenzied world.• If you are using an extension flex reel, always uncoil it fully to prevent it from overheating.• It was hundreds of feet long, initially resembling a huge snake uncoiling itself.• Fenella could feel the shadows stirring already; she could feel a dark, slimy something uncoiling somewhere close by.• Most of all, it requires laying aside the guilt, uncoiling the defensive posture and dealing with the facts. 