mon·do (mŏndō′) Slang
Enormous; huge: a mondo list of pizza toppings.
Extremely; very: a mondo big mistake.
[From mondo (bizarro), very bizarre, from Italian Mondo (Cane), (A Dog's) World, name of movie with bizarre scenes that was a cult favorite in the 1960s.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.