dervish
Concise Oxford English Dictionary © 2008 Oxford University Press:
dervish /ˈdəːvɪʃ/
▶noun a member of a Muslim (specifically Sufi) fraternity vowed to poverty, some orders of which (particularly the whirling dervishes) are known for their wild rituals.
– origin from Turk. derviş, from Pers. darvīš ‘poor’.
'dervish' also found in these Oxford entries:

