An affix added to the end of a word or stem, serving to form a new word or functioning as an inflectional ending, such as -ness in gentleness, -ing in walking, or -s in sits.
tr.v. suf·fixed, suf·fix·ing, suf·fix·es
To add as a suffix.
[New Latin suffīxum, from Latin, neuter of suffīxus, past participle of suffīgere, to fasten underneath, affix : sub-, sub- + fīgere, to fix, fasten; see dhīgw- in the Appendix of Indo-European roots.]
suf′fix·ation (sŭf′ĭk-sāshən), suf·fixion (sə-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.