1. A state of mental or physical inactivity or insensibility.
2. Lethargy; apathy. See Synonyms at lethargy.
3. The dormant, inactive state of a hibernating or estivating animal.
[Latin, from torpēre, to be stiff; see ster-1 in the Appendix of Indo-European roots.]
tor′po·rific (-pə-rĭfĭk) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.