Of, relating to, or being the grammatical case indicating a state of being or an existence in a particular capacity or state in some languages, as in Finnish professorina, "as a professor."
1. The essive case.
2. A word or form in the essive case.
[Finnish essiivi, from New Latin essīvus : Latin esse, to be; see es- in the Appendix of Indo-European roots + Latin -īvus, -ive.]
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.