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”.