1. Causing mischief.
2. Playful in a naughty or teasing way.
3. Troublesome; irritating: a mischievous prank.
4. Causing harm, injury, or damage: mischievous rumors and falsehoods.
[Middle English mischevous, from mischef, mischief; see MISCHIEF.]
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.