What is the opposite of breakthrough?

Need antonyms for breakthrough? Here's a list of opposite words from our thesaurus that you can use instead.

Noun
Opposite of a sudden, dramatic, and important discovery or development
Noun
Opposite of a discovery
“The theft of the crown artifact was a loss of epic proportions to the museum.”
Noun
Opposite of something invented through research and development
Noun
Opposite of a development or improvement
“The retrogression in the company's technology due to a lack of funding for research and development was noticeable.”
Noun
Opposite of something that is made larger by size or amount
“All questions showed a decrease in knowledge retention from the first posttest to the delayed-posttest.”
Noun
Opposite of development or improvement in a given product or field
Noun
Opposite of an increase or improvement in quality, value, or extent
Adjective
Opposite of characterized by major progress
Adjective
Opposite of being advanced in development
“This is a primitive device that lacks the features of its modern predecessors.”
Adjective
Opposite of involving the latest methods or concepts
“This paper documents antiquated techniques developed decades ago in the field of mechanical engineering.”
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