in·su·late (ĭnsə-lāt′, ĭnsyə-)
tr.v. in·su·lat·ed, in·su·lat·ing, in·su·lates
1. To prevent the passage of heat, electricity, or sound into or out of, especially by surrounding or covering with a nonconducting material: insulate an attic.
2. To cause to be in a detached or isolated position. See Synonyms at isolate.
[Latin īnsula, island + -ATE1.]
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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.