Misconduct or wrongdoing, especially by a public official.
[Anglo-Norman malfaisance, from Old French malfaisant, malfeasant, present participle of malfaire, to do evil, from Latin malefacere; see MALEFACTOR.]
mal·feasant adj. & n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.