tr.v. im·mu·nized, im·mu·niz·ing, im·mu·niz·es
1. To render immune.
2. To produce immunity in, as by inoculation.
3. Law To grant immunity from prosecution or suit: immunize a witness.
im′mu·ni·zation (-nĭ-zāshən) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.