mel·io·rate (mēlyə-rāt′, mēlē-ə-)
v. mel·io·rat·ed, mel·io·rat·ing, mel·io·rates
To make better; improve.
To grow better.
[Latin meliōrāre, meliōrāt-, from melior, better; see mel-2 in the Appendix of Indo-European roots.]
melio·ra·ble (-rə-bəl) adj.
melio·ra′tive adj. & 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.