sas·tru·ga (să-strgə, săstrə-, sästrə-) also zas·tru·ga (ză-strgə, zä-)
n. pl. sas·tru·gi (-gē) also zas·tru·gi
A long wavelike ridge of snow, formed by the wind and found on the polar plains.
[Russian dialectal zastruga : za, beyond + struga, deep place into which one may fall; see sreu- in the Appendix of Indo-European roots.]
(click for a larger image)sastruga
Castle Rock and Mt. Erebus
Ross Island, Antarctica
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.