Final answer:
The antonym of the word 'perturb' is 'calm'.
Step-by-step explanation:
The antonym of the word 'perturb' is 'calm'. In the provided passage, massage therapy is described as an intended calming treatment. However, it can perturb those who are uncomfortable with an unfamiliar touch. These individuals may feel anxious or disturbed instead of relaxed.
Learn more about Antonyms of the word 'perturb' in the provided passage