šňůra in English:

My husband cut our son's umbilical cord.

He caught the cord.

She wore the key on a cord around her neck. They used cords to tie the tent to the trees.

... box in the spinal cord where new wires, new...

After a minute of free fall he pulled the rip cord and out came the parachute.

Central nervous system consists of brain, cerebellum, medulla oblongata and spinal cord.

I think this lamp has a short because the light comes on only if I jiggle the cord.

Bolas are made up of a long cord with two stone balls at the free ends.

A device implanted in the spinal cord, dubbed the Orgasmotron, allows female patients to experience orgasm with the flick of a remote control.

Unfortunately, this cord isn't long enough

The kidnappers tied his hands with a piece of thick cord.

a piece/length of cord

extension cord

The definition of a cord is string or rope. cord = strong thick string.

That extension cord looks dangerous to me. You see where it's frayed there?