v. in·fringed, in·fring·ing, in·fring·es
1. To transgress or exceed the limits of; violate: infringe a contract; infringe a patent.
2. Obsolete To defeat; invalidate.
To encroach on someone or something; engage in trespassing: an increased workload that infringed on his personal life.
[Latin īnfringere, to destroy : in-, intensive pref.; see IN-2 + frangere, to break; see bhreg- 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.