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deteriorate

de·te·ri·o·rate

deteriorate

 
pronunciation:
dih ti ri reIt
part of speech: verb
inflections: deteriorated, deteriorates, deteriorating
definition: to make or become less in value or quality.
Since she started smoking, her health has deteriorated.Rust deteriorates metal.
antonyms:
improve, restore
similar words:
decline, slip, suffer
derivation: deterioration (n.)