n. pl. ex·trem·i·ties
1. The outermost or farthest point or portion: at the extremity of the peninsula.
2. The greatest or utmost degree: the extremity of despair.
3. Grave danger, necessity, or distress: people in extremity.
4. An extreme or severe measure: had to resort to extremities in the crisis.
a. A bodily limb: She is in a wheelchair because of weakness of the lower extremities.
b. extremities The hands and feet: Frostbite affects the extremities first.
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.