v. preached, preach·ing, preach·es
1. To proclaim or put forth in a sermon: preached the gospel.
2. To advocate, especially to urge acceptance of or compliance with: preached tolerance and peaceful coexistence.
3. To deliver (a sermon).
1. To deliver a sermon.
2. To give religious or moral instruction, especially in a tedious manner.
preach to the choir/converted
To argue in favor of a viewpoint already held by one's audience.
[Middle English prechen, from Old French preechier, from Late Latin praedicāre, from Latin, to proclaim : prae-, pre- + dicāre, to proclaim; see deik- 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.