adj. un·hap·pi·er, un·hap·pi·est
1. Not happy or joyful; sad or sorrowful: unhappy over his friend's departure.
2. Not satisfied; displeased or discontented: unhappy with her raise.
3. Not attended by or bringing good fortune; unlucky: an unhappy development.
4. Not suitable; inappropriate: an unhappy choice of words.
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.