a. Subject to no further debate or dispute; final and unassailable: a peremptory decree.
b. Not allowing contradiction or refusal; imperative: The officer issued peremptory commands.
2. Offensively self-assured; imperious or dictatorial: a swaggering, peremptory manner.
[Latin perēmptōrius, from perēmptus, past participle of perimere, to take away : per-, per- + emere, to obtain; see em- in the Appendix of Indo-European roots.]
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.