Ot·to I (ŏtō, ôtō) also O·tho I (ōthō, ōtō) Known as "Otto the Great." 912-973.
King of Germany (936-973) and first Holy Roman emperor (962-973). He brought Italy and Burgundy under German control.
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.