v. for·ti·fied, for·ti·fy·ing, for·ti·fies
1. To make strong, as:
a. To strengthen and secure (a position) with fortifications.
b. To reinforce by adding material: fortified the riverbank against erosion.
c. To impart physical strength or endurance to; invigorate: felt fortified by a good night's sleep.
d. To give emotional, moral, or mental strength to; encourage: Prayer fortified us during our crisis.
2. To enrich (food, for example), as by adding vitamins.
To build fortifications.
[Middle English fortifien, from Old French fortifier, from Late Latin fortificāre : Latin fortis, strong; see bhergh-2 in the Appendix of Indo-European roots + Latin -ficāre, -fy.]
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.