Sentence:  For the sake of the minister's health, and to enable the <WSD>leech</WSD> to gather plants with healing balm in them, they took long walks on the seashore or in the forest; mingling various talk with the plash and murmur of the waves, and the solemn wind anthem among in treetops. / 
Meaning of the word marked with <WSD> tags:  A physician.