jumpstart (Noun) — Starting an automobile engine that has a weak battery by means of jumper cables to another car. ex. "my battery was dead so I had to get a jumpstart from my neighbour"
jumpstart (Verb) — Start (a car engine whose battery is dead) by connecting it to another car's battery.
jumpstart (Verb) — Start or re-start vigorously. ex. "The Secretary of State intends to jumpstart the Middle East Peace Process"