Sentence:  Instead, I was still feeling ok after the previous day spent mainly in the Maldivian waters diving and snorkeling, and I had booked for myself two other morning scuba dives on Tuesday. ... Andrea passed the opportunity for these dives today, resting and <WSD>defervescing</WSD> from the tour-de-force of the day before. 
Meaning of the word marked with <WSD> tags:  To become less agitated; to cool down.