for ‧ ti ‧ tude /ˈfɔːtətjuːd, ˈfɔːtɪtjuːd $ ˈfɔːrtətuːd/ BrE AmE noun [uncountable] formal
[ Date: 1300-1400 ; Language: Latin ; Origin: fortitudo , from fortis 'strong' ]
courage shown when you are in great pain or experiencing a lot of trouble SYN strength :
Winnie is a woman of quiet fortitude who has endured a lot of suffering.