stumbling block [stŭmˈblĭng]
The definition of a stumbling block is an obstacle or problem in the way of some desired aim.
An example of a stumbling block is the lack of a driver's license when planning a road trip.
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an obstacle, hindrance, or difficulty standing in the way of progress or understanding
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
An obstacle or impediment.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. stumbling block - Phrases/Idioms
A hindrance or obstacle, as in
His lack of a degree is a real stumbling block to his advancement. This term originally meant “a tree stump over which one trips.” Its figurative use dates from the early 1500s. The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.