coil
coil [coil coils coiled coiling] verb, noun BrE [kɔɪl] NAmE [kɔɪl]
verb intransitive, transitive
to wind into a series of circles; to make sth do this
•~ up The snake coiled up, ready to strike.
•~ round, around, etc. sth Mist coiled around the tops of the hills.
•~ sth (+ adv./prep.) to coil a rope into a loop
•Her hair was coiled on top of her head.
•a coiled spring
Verb forms: 
Word Origin:
early 16th cent. (as a verb): from Old French coillir, from Latin colligere ‘gather together’, from col- ‘together’ + legere ‘choose or collect’.
Example Bank:
•He coiled the rope up tightly and put it away.
•Her hair was neatly coiled into a bun.
•The snake coiled itself around a branch.
•He coiled the rope into a loop.
•Mechanical watches are powered by a coiled spring.
noun 
1. a series of circles formed by winding up a length of rope, wire, etc
•a coil of wire
2. one circle of rope, wire, etc. in a series
•Shake the rope and let the coils unwind.
•a snake's coils
3. a length of wire, wound into circles, that can carry electricity
4. = ↑IUD
Word Origin:
early 16th cent. (as a verb): from Old French coillir, from Latin colligere ‘gather together’, from col- ‘together’ + legere ‘choose or collect’.
Example Bank:
•a coil of rope
•thick coils of blonde hair
•In her dream the snake wrapped its coils around her.
•The device consisted of a coil of copper wire, connected at either end to two electrodes.
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