line of life
life line
lifeline

The very war which threatened the company offered it a life line.

"Open the side door and throw out two life lines!"

Younger members are the life line, and we mean to attract more of them.

"Never have I seen a life line such as this," she whispered.

It was good to float at the end of a life line, breathing.

He dived to answer it, his life line to the outside world.

Doctor Did you hold on to the life line?

He got himself up, spitting water, and grabbed a life line.

Julio or a caller on hold may also be used as a life line.

I'd expected a lot of talk about life lines and love lines, but she didn't have a chance to get to that.