Third-person singular simple present indicative form of fortify.(verb)
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Use "fortifies" in a sentence
"Armstrong for Eddie Griffin fortifies the Nets at shooting guard and center."
"Taking the nutrient approach to self serving extremes, the food industry "fortifies" highly processed foods, like refined cereals and sugar-sweetened beverages, with selected micronutrients and recharacterizes them as nutritious."
"_whatever_, is nom. to "fortifies;" _which_, the relative part, is nom. to "purifies.""