tr.v. pre·fixed, pre·fix·ing, pre·fix·es
1. To put or attach before or in front of.
2. (prē-fĭks) To settle or arrange in advance.
a. To add as a prefix.
b. To add a prefix to.
1. Grammar An affix, such as dis- in disbelieve, attached to the front of a word to produce a derivative word or an inflected form.
2. A letter, word, abbreviation, or number placed before a name, address, or other identifying label to indicate class or category: You have to indicate on the form whether you prefer the prefix Mr., Ms., or Dr.
[Middle English prefixen, from Old French prefixer : pre-, before (from Latin prae-; see PRE–) + fixer, to place (from Latin fīxus, past participle of fīgere, to fasten; see dhīgw- in the Appendix of Indo-European roots). N., from New Latin praefīxum, from neuter sing. of Latin praefīxus, past participle of praefīgere, to fix in front : prae-, pre- + fīgere, to fasten.]
pre′fix·ation (-fĭk-sāshən), pre·fixion (-fĭkshən) n.
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.