obstruct

verb

ob·​struct əb-ˈstrəkt 

äb-

obstructed; obstructing; obstructs

transitive verb

1

: to block or close up by an obstacle

A piece of food obstructed his airway.

The road was obstructed by a fallen tree.

2

: to hinder from passage, action, or operation : impede

Constant interruptions obstruct our progress.

was charged with obstructing justice by lying to investigators

3

: to cut off from sight

A wall obstructs the view.

obstructive

əb-ˈstrək-tiv 

äb-

adjective or noun

obstructiveness noun

obstructor

əb-ˈstrək-tər 

äb-

noun

Synonyms

• clog
• cramp
• embarrass
• encumber
• fetter
• hamper
• handcuff
• handicap
• hinder
• hobble
• hog-tie
• hold back
• hold up
• impede
• inhibit
• interfere (with)
• manacle
• shackle
• short-circuit
• stymie
• tie up
• trammel

Choose the Right Synonym for obstruct

hinder, impede, obstruct, block mean to interfere with the activity or progress of.

hinder stresses causing harmful or annoying delay or interference with progress.

rain hindered the climb

impede implies making forward progress difficult by clogging, hampering, or fettering.

tight clothing that impedes movement

obstruct implies interfering with something in motion or in progress by the sometimes intentional placing of obstacles in the way.

the view was obstructed by billboards

block implies complete obstruction to passage or progress.

a landslide blocked the road

Examples of obstruct in a Sentence

A large tree obstructed the road.

A piece of food obstructed his airway and caused him to stop breathing.

She was charged with obstructing police.

She was charged with obstructing justice by lying to investigators.

Recent Examples on the Web

Mapes’ effort to obstruct the federal investigation was ultimately unsuccessful as prosecutors moved forward with charges against Madigan and several others as part of the sweeping probe. —Chicago Tribune, 24 Jan. 2025

Just 30 minutes after being injected with microplastics, blood flow could be obstructed in the mice's brains. —Hatty Willmoth, Newsweek, 24 Jan. 2025

There’s a pesky column at the corner, which manages to just barely obstruct sightlines — though perhaps this has meaning of its own, revealing a potential non-linguistic barrier between us and them, while also helping to give the classroom its necessary claustrophobic tension. —Christian Lewis, Variety, 24 Jan. 2025

Sutton was convicted by a federal jury in December of 2022 of second-degree murder, conspiracy to obstruct, and obstruction of justice. —Aysha Bagchi, USA TODAY, 23 Jan. 2025

Word History

Etymology

Latin obstructus, past participle of obstruere, from ob- in the way + struere to build, heap up — more at ob-, strew

First Known Use

1590, in the meaning defined at sense 1

Kids Definition

obstruct

verb

ob·​struct əb-ˈstrəkt 

äb-

1

: to close up by an obstacle

a fallen tree obstructed the roadway

2

: to be or get in the way of : hinder

lying to the police obstructs justice

Medical Definition

obstruct

transitive verb

ob·​struct əb-ˈstrəkt, äb- 

: to block or close up by an obstacle

veins obstructed by clots