IPA: /ˈhɜːrbəlɪst/
KK: /ˈhɜrbəlɪst/
A person who grows, collects, or uses herbs, particularly for medicinal purposes.
The herbalist recommended a tea made from chamomile to help with sleep.
Herbalist → It is formed from "herb" (from Old French *herbe*, meaning plant or grass) and "-alist" (a suffix indicating a person who practices or is concerned with). An herbalist is a person who practices or is concerned with herbs, particularly in the context of medicine or healing.
Think of someone who is knowledgeable about 'plants' ('herb') and practices using them for healing — that's what an herbalist does.