1. Habitually untalkative. See Synonyms at laconic.
2. Characterized by reserve or a lack of expression: "Beneath his taciturn exterior was an optimist" (Buzz Bissinger).
[French taciturne, from Old French, from Latin taciturnus, from tacitus, silent; see TACIT.]
tac′i·turni·ty (-tûrnĭ-tē) n.
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.