adj. grim·mer, grim·mest
a. Discouraging or depressing: The business news has been grim lately.
b. Dismal; gloomy: a grim, rainy day.
a. Stern or forbidding: The judge was grim when handing out the sentence.
b. Repellent or horrifying: the grim task of searching for bodies in the rubble. See Synonyms at ghastly.
3. Unrelenting or uncompromising: grim determination.
[Middle English, from Old English, fierce, severe.]
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.