Fortify

fortalecer

(to give power, strength, or vigour to (oneself or someone, or to something) — see also strengthen)

fortalecer

(to increase the nutritional value of (food) by adding ingredients)

fortalecer

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

fortificar

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