The patient will certainly recuperate under medical care.

The ANTONYM of the word RECUPERATE is:

Option 1: Resuscitate -> means to revive or bring back to consciousness, similar in meaning to recovery.

Option 2: Reimburse -> means to repay money, unrelated to health or recovery.

Option 3: Degenerate -> means to deteriorate or decline in health/condition, opposite of recovering.

Option 4: Convalesce -> means to gradually recover health, essentially a synonym of recuperate.

Hence, Option 3: Degenerate -> "Recuperate" means to recover and regain health, while "degenerate" means to deteriorate or worsen in condition, making them perfect antonyms in the context of health and medical care -> correct