Clemens, Samuel Langhorne Pen name Mark Twain (twān) 1835-1910.
American author who drew on his childhood along the Mississippi River to create masterpieces of humor and sarcasm, including Tom Sawyer (1876) and The Adventures of Huckleberry Finn (1884).
(click for a larger image)Samuel Clemens
photographed c. 1907
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.