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Webster 1913 Edition

Verb.

[1st pref.

un-

coil

To unwind or open, as a coil of rope.

Derham.

Verb.

To unwind or open, as the turns of a rope or other line.

uncoil ‎(third-person singular simple present uncoils, present participle uncoiling, simple past and past participle uncoiled)

unwind or untwist (something)

unwind or untwist (oneself)