fortify

/ˈfȯr-tə-ˌfī/

Middle English fortifien, from Anglo-French fortifier, from Late Latin fortificare, from Latin fortis strong

verb

  1. to make strong: such as

  2. to strengthen and secure (a place, such as a town) by forts or batteries

  3. to give physical strength, courage, or endurance to

a city fortified by high walls