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shelfware

or shelf ware

[ shelf-wair ]
/ ˈʃɛlfˌwɛər /
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noun Informal.
Computers. software or hardware that remains unsold, unused, or underused: shelfware as part of a bundled license deal.
ideas or findings that are not used or acted upon: The results of your market research can quickly become shelfware.
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The rainy weather could not ________ my elated spirits on my graduation day.
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Origin of shelfware

shelf + -ware (in the sense “goods sitting on a shelf”)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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