o·vert (ō-vûrt, ōvûrt′)
1. Open and observable; not hidden, concealed, or secret: overt hostility; overt intelligence gathering.
2. Of, relating to, or being military or intelligence operations sanctioned or mandated by Congress: overt aid to the rebels.
[Middle English, from Old French, past participle of ovrir, to open, from Vulgar Latin *ōperīre, alteration (influenced by Latin cōperīre, to cover) of Latin aperīre; see wer-4 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.