To make worse; to make inferior in quality or value; to impair.
to deteriorate the mind
To grow worse; to be impaired in quality; to degenerate.
During this fine run through Fife the weather had deteriorated rapidly, and as we passed Wormit and came onto the Tay Bridge heavy rain clouds were piled over the sea.
Learned borrowing from Late Latin dēteriorātus, perfect passive participle of Late Latin dēteriorō (see -ate (verb-forming suffix)), further from Latin dēterior (“worse”). Cognate with French détérior...
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