That degrades the value of something; deprecating.(adjective)
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Use "depreciating" in a sentence
"And the part I don't like is people are refinancing up to the value of their home and then on top of that they're buying what I call depreciating assets, cars and boats and things that are going to lose value instantly and going into debt for a long time."
"The fourth and the last one that I want to catalogue at the moment is the belief that there is a great advantage in depreciating your currency as a means of putting you in the export business or strengthening your international business and exports."
"Clement was getting toward an age when clever youngsters are not unapt to exercise their talents in depreciating home surroundings."