1. Unable to wait patiently or tolerate delay; restless.
2. Unable to endure irritation or opposition; intolerant: impatient of criticism.
3. Expressing or produced by impatience: an impatient scowl.
4. Restively eager or desirous; anxious: impatient to begin.
[Middle English impacient, from Old French impatient, from Latin impatiēns, impatient- : in-, not; see IN-1 + patiēns, present participle of patī, to suffer, endure; see PATIENT.]
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.