obstruction
definition
something that prevents or hinders progress or movement
example
The obstruction caused by the fallen tree blocked the entire road, preventing vehicles from passing.
synonyms
hindranceimpedimentbarrier
word origin — The word 'obstruction' originates from the Latin 'obstructio', which comes from 'obstruere', meaning 'to block up, hinder' (from 'ob-' meaning 'against' + 'struere' meaning 'to build').