fortitude

n. material strength,fortification; militarystrength,strength of the defences实力，设防；武力，防御力量。
△Oth.1.3. 222:“Othello,the fortitude of theplace is best known to you；”奥瑟罗，当地的防御力量你最了解。
△1H.VI.2.1.17:“Despairing of his own arm’sfortitude,/To join with witches and the help of hell!”对于他自己的武力绝望了，竟然跟女巫联合起来，还向地狱求救！

fortitude[ˈfɔ:titju:d]

n. 坚韧，刚毅，坚强意志，坚强精神