coil
/kɔɪl; kɔɪl/ v[Ipr, Ip, Tn, Tn.pr, Tn.p]
~ (oneself/sth) round sth/up wind or twist (oneself/sth) into a continuous circular or spiral shape 将（自己[某物]）卷或盘成圈或螺旋形
The snake coiled (itself) round the branch. 蛇（把身体）盘绕在树枝上.
coil (up) a length of rope, flex, wire, etc 卷（起）一段绳子、 花线、 金属丝等. coil, n
1 length of rope, etc wound into a series of loops 缠成许多圈的绳子等
a coil of flex 一盘花线.
2 single ring or loop of rope, etc （绳等的）环, 圈
the thick coils of a python 盘卷著的大蟒 * a coil of hair 发圈.
3 length of coated wire wound in a spiral to conduct an electric current 线圈.
4 = intra-uterine device (intra-uterine).