fortify

To give power, strength, or vigour to (oneself or someone, or to something); to strengthen.

To support (one's or someone's opinion, statement, etc.) by producing evidence, etc.; to confirm, to corroborate.

To increase the nutritional value of (food) by adding ingredients, especially minerals or vitamins.

To impart fortitude or moral strength to (someone or their determination, or something); to encourage.

To make (something) defensible against attack by hostile forces.

To make (something) structurally strong; to strengthen.

To increase the defences of (an army, soldiers, etc.), or put (it or them) in a defensive position.

To secure and strengthen (a place, its walls, etc.) by installing fortifications or other military works.

To provide (a city, a fortress, an army, etc.) with equipment or soldiers.

To add spirits to (wine) to increase the alcohol content.