v. in·toned, in·ton·ing, in·tones
1. To recite in a singing tone.
2. To utter in a monotone.
1. To speak with a singing tone or with a particular intonation.
2. Music To sing a plainsong intonation.
[Middle English entonen, from Old French entoner, from Medieval Latin intonāre : Latin in-, in; see IN-2 + Latin tonus, tone; see TONE.]
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.