A sedimentary material consisting of very fine particles intermediate in size between sand and clay.
v. silt·ed, silt·ing, silts
To become filled with silt: an old channel that silted up.
To fill, cover, or obstruct with silt: River sediments gradually silted the harbor.
[Middle English sylt, probably of Scandinavian origin; see sal- 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.