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for·ti·tude

(fôrtĭ-td′, -tyd′)

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 the Appendix of Indo-European roots.]

for′ti·tudi·nous (-tdn-əs, -tyd-) adj.

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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