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[uh b-struhkt] /əbˈstrʌkt/
verb (used with object)
to block or close up with an obstacle; make difficult to pass:
Debris obstructed the road.
to interrupt, hinder, or oppose the passage, progress, course, etc., of.
to block from sight; to be in the way of (a view, passage, etc.).
Origin of obstruct
1605-15; < Latin obstructus (past participle of obstruere to build or pile up in the way, bar). See ob-, construct
Related forms
obstructedly, adverb
obstructer, obstructor, noun
obstructingly, adverb
obstructive, adjective
obstructively, adverb
obstructiveness, obstructivity
[ob-struhk-tiv-i-tee] /ˌɒb strʌkˈtɪv ɪ ti/ (Show IPA),
nonobstructive, adjective
nonobstructively, adverb
nonobstructiveness, noun
preobstruct, verb (used with object)
unobstructed, adjective
unobstructive, adjective
1. stop, choke, clog, hinder, impede, prevent; check, slow, retard, arrest.
1. encourage, further. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for unobstructed
Contemporary Examples
Historical Examples
  • I had an unobstructed view of the tower and of the Tudor garden.

    Bat Wing Sax Rohmer
  • The top of the chaise was down, so that the view was unobstructed on every side.

    Rollo in Switzerland Jacob Abbott
  • For myself, however, I simply regard it as one of Nature's own cures, unobstructed and unembarrassed by medicine.

  • If she had wished to proceed the path now lay clear and unobstructed before her.

    The Day of Wrath Maurus Jkai
  • The channel was unobstructed; and not an island, islet, or rock, was visible.

    Afloat And Ashore James Fenimore Cooper
  • One of them is unobstructed by furniture, and is wholly visible.

British Dictionary definitions for unobstructed


(of a passageway, view, etc) not blocked by any object


verb (transitive)
to block (a road, passageway, etc) with an obstacle
to make (progress or activity) difficult
to impede or block a clear view of
Derived Forms
obstructor, noun
obstructive, adjective, noun
obstructively, adverb
obstructiveness, noun
Word Origin
C17: Latin obstructus built against, past participle of obstruere, from ob- against + struere to build
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unobstructed

1650s, from un- (1) "not" + past participle of obstruct.



1610s, a back-formation from obstruction or else from Latin obstructus, past participle of obstruere "to block, to stop up" (see obstruction). Related: Obstructed; obstructing.

Online Etymology Dictionary, © 2010 Douglas Harper
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unobstructed in Medicine

obstruct ob·struct (əb-strŭkt', ŏb-)
v. ob·struct·ed, ob·struct·ing, ob·structs
To block or close a body passage so as to hinder or interrupt a flow.

ob·struc'tive adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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