To motivate, to instill someone with determination.
To recharge, to give electrical power to something.
To deliberately infect an individual with HIV as part of bug-chasing.
To make bolder, zestier, or more exciting.
To beat (someone) up by punching, to fist-fight.
To attack or target a group of greater power or status than oneself.
To switch (a source) into the main transmission.