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 impart strength or vigor to.
To increase the nutritional value of food by adding ingredients.
To increase the defenses of; to strengthen and secure by military works; to render defensible against an attack by hostile forces.
To add spirits to wine to increase the alcohol content.