deb·o·nair also deb·o·naire (dĕb′ə-nâr)
1. Sophisticated; urbane.
2. Gracious and charming in a cheerful, carefree way.
[Middle English debonaire, gracious, kindly, from Old French, from de bon aire, of good lineage or disposition : de, of (from Latin dē; see DE-) + bon, bonne, good (from Latin bonus; see deu-2 in the Appendix of Indo-European roots) + aire, nest, family; see AERIE.]
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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:
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.