What does fortitude mean?

Fortitude

for·ti·tude // (fôr'tĭ-tōōd', -tyōōd')  
n.  Strength of mind that allows one to endure pain or adversity with courage.

[Middle English, from Latin fortitūdō, from fortis, strong; see bhergh-² in Indo-European roots.] for'ti·tu'di·nous (-tōōd'n-əs, -tyōōd'-) adj.

Word Origin and History

fortitude

1422, from M.Fr. fortitude, from L. fortitudo “strength,” from fortis “strong, brave”.