tr.v. ex·pelled, ex·pel·ling, ex·pels
1. To force or drive out: expel an invader.
2. To discharge from or as if from a receptacle: expelled a sigh of relief.
3. To deprive of membership or rights in an organization; force to leave: expelled the student from college for cheating.
[Middle English expellen, from Latin expellere : ex-, ex- + pellere, to drive; see pel-5 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.