tr.v. un·der·scored, un·der·scor·ing, un·der·scores
1. To underline: underscored the incorrect answers in red ink.
a. To put emphasis on; stress: In a press release, the leaders underscored their commitment to continued negotiations.
b. To cause to appear important or deserving of attention: The energy crisis underscored the need to increase fuel efficiency.
A line drawn under writing or text to indicate emphasis or italic type.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.