FORTIFY

verb (-fied; -fying) Etymology: Middle English fortifien, from Anglo-French fortifier, from Late Latin fortificare, from Latin fortis strong Date: 15th century transitive verb to make strong: as, to strengthen and secure (as a town) by forts or batteries, to give physical strength, courage, or endurance to , to add mental or moral strength to ; encourage , to add material to for strengthening or enriching , intransitive verb to erect fortifications, fortifier noun