noun
a thing that blocks one's way or prevents or hinders progress
verb
none
adjective
none
adverb
none
pronoun
none
preposition
none
conjunction
none
interjection
none
article
none
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The company faced a major obstacle when their main supplier went out of business.
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I hit a big obstacle when I found out my car wouldn't start this morning.
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I can't believe that obstacle course we did last weekend, it was so intense!
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Fear can be a huge obstacle in achieving your dreams.