1. Thoroughly; completely; intensely: perfervid.
2. Containing an element in its highest oxidation state: perchloric acid.
3. Containing a large or the largest possible proportion of an element: peroxide.
4. Containing the peroxy group: peracid.
[Latin, from per, through; see per1 in the Appendix of Indo-European roots.]
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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.