v. in·ten·si·fied, in·ten·si·fy·ing, in·ten·si·fies
1. To make intense or more intense: The press has intensified its scrutiny of the candidate's background.
2. To increase the contrast of (a photographic image).
To become intense or more intense: The search intensified as dusk approached.
in·ten′si·fi·cation (-fĭ-kāshən) n.
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.