adj. ic·i·er, ic·i·est
1. Containing or covered with ice: an icy road.
2. Bitterly cold; freezing: an icy day. See Synonyms at cold.
a. Unfriendly or hostile: an icy stare.
b. Showing no emotion: icy detachment.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.