say it: AHB-stuh-kuhl
obstacle is a noun meaning "something immaterial that stands in the way and must be circumvented or surmounted". It carries 2 recorded senses.
something immaterial that stands in the way and must be circumvented or surmounted
“lack of imagination is an obstacle to one's advancement”
“the poverty of a district is an obstacle to good education”
“the filibuster was a major obstruction to the success of their plan”
an obstruction that stands in the way (and must be removed or surmounted or circumvented)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for obstacle come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.