dervish (n.)youdaoicibaDictYouDict[dervish 词源字典]
1580s, from Turkish dervish, from Persian darvesh, darvish "beggar, poor," hence "religious mendicant;" equivalent of Arabic faqir (see fakir). The "whirling dervishes" are just one order among many. Originally dervis; modern spelling is from mid-19c.[dervish etymology, dervish origin, 英语词源]