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ob·struc·tion

obstruction

 
 
pronunciation:
b struhk shn
part of speech: noun
definition 1: something that blocks the way or prevents progress.
The mountains were an obstruction for travelers until airplanes were invented.
synonyms:
bar, block, hindrance, hurdle, obstacle
antonyms:
assistance
similar words:
barrier, hitch
definition 2: an act or instance of obstructing, or the condition of being obstructed.
Eating too much fat can lead to obstruction of blood vessels.
antonyms:
assistance