adj. chast·er, chast·est
a. Not having experienced sexual intercourse; virginal.
b. Abstaining from sexual relations that are not sanctioned by certain religious laws or moral principles.
c. Abstaining from sexual relations; celibate.
2. Not involving or suggestive of sexual desire or indecency: a chaste kiss; a chaste conversation.
3. Pure or simple in design or style; austere.
[Middle English, from Old French, from Latin castus; see kes- in the Appendix of Indo-European roots.]
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.