0
maturing(noun, stale, fading)
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miter
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mucked up
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musty
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nervous wreck
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no go
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not functioning
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not working
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not young(expression, enervated, irresilient)
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obsolete
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of advanced age
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old-fogeyish
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old-fogyish
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olden
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on the blink
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on the ropes(expression, idiom, enervated, irresilient)
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on the shelf
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on the skids(expression, idiom, decrease, ebb)
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out of action
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out of condition(expression, idiom, enervated, irresilient)
11 years ago|1.2k views|share |citing 
APASmart Define. (2015). senescent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/senescent/thesaurus/synonyms
ChicagoSmart Define. 2015. "senescent thesaurus" https://smartdefine.org/senescent/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, senescent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/senescent/thesaurus/synonyms>.
MLASmart Define. "senescent thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/senescent/thesaurus/synonyms>