v. slum·bered, slum·ber·ing, slum·bers
1. To sleep.
2. To be dormant or quiescent.
To pass (time) in sleep: slumbered the night away.
2. A state of inactivity or dormancy.
[Middle English slumeren, slumberen, frequentative of slumen, to doze, probably from slume, light sleep, from Old English slūma.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.