ob·struct (əb-strŭkt, ŏb-)
tr.v. ob·struct·ed, ob·struct·ing, ob·structs
1. To block or fill (a passage or opening) with obstacles or an obstacle.
2. To impede, retard, or interfere with; hinder: obstructed my progress. See Synonyms at hinder1.
3. To be or get in the way of (a view or something to be seen). See Synonyms at block.
[Latin obstruere, obstrūct- : ob-, against; see OB- + struere, to pile up; see ster-2 in the Appendix of Indo-European roots.]
ob·structer, ob·structor n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.