pro·fun·di·ty (prə-fŭndĭ-tē, prō-)
n. pl. pro·fun·di·ties
1. Great intellectual insight or understanding: profundity of thought.
2. Intensity of feeling or conviction.
3. Something profound or abstruse: the profundities of mathematics.
4. Great extent downward; great depth.
[Middle English profundite, from Old French, from Late Latin profunditās, from Latin profundus, deep; see PROFOUND.]
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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.