jump-start

The process or result of jump-starting a motor vehicle.

“I left my headlights on all night. Could you give me a jump-start?”

To start a motor vehicle by passing an electrical current from a charged battery to the discharged ("dead" or "flat") battery of the vehicle being started, by using booster cables to temporarily connect the two batteries in parallel.

To reactivate or rejuvenate.

“Giving a really good speech at the convention could jump-start her political career.”