ty·ran·ni·cal (tĭ-rănĭ-kəl, tī-) also ty·ran·nic (-rănĭk)
1. Of or relating to a tyrant or tyranny: a tyrannical government.
2. Characteristic of a tyrant or tyranny; despotic and oppressive: a tyrannical supervisor. See Synonyms at dictatorial.
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.