Choose the perfect synonym or antonym for the word

Deteriorate

/dɪˈtɪəriəreɪt/

To become worse or less valuable over time.

Synonyms:

The city's infrastructure began to deteriorate rapidly.

His health continued to deteriorate despite treatments.

Relations between the two countries have deteriorated.

Originating from the Latin word deteriorare, meaning to make worse, first used in English in the late 16th century.

7 mentions per 1 million words

Moderate

Hint: Frequency according to COCA