Dervish, Darvesh, or Darwīsh (from درویش, Darvīsh) in Islam can refer broadly to members of a Sufi fraternity (tariqah), or more narrowly to a religious mendicant, who chose or accepted material poverty. The latter usage is found particularly in Persian and Turkish (derviş) as well as in Amazigh (Aderwish), corresponding to the Arabic term faqīr. Their focus is on the universal values of love and service, deserting the illusions of ego (nafs) to reach God. In most Sufi orders, a dervish is known to practice dhikr through physical exertions or religious practices to attain the ecstatic trance to reach God. Their most popular practice is Sama, which is associated with the 13th-century mystic Rumi. In folklore and with adherents of Sufism, dervishes are often credited with the ability to perform miracles and ascribed supernatural powers. Historically, the term Dervish has also been used more loosely, as the designation of various Islamic political movements or military entities.
The Persian word darvīsh (درویش) is of ancient origin and descends from a Proto-Iranian word that appears in Avestan as , "needy, mendicant", via Middle Persian driyosh. It has the same meaning as the Arabic word faqīr, meaning people whose contingency and utter dependence upon God is manifest in everything they do and every breath they take.
Dervishes try to approach God by virtues and individual experience, rather than by religious scholarship.
Many dervishes are mendicant ascetics who have taken a vow of poverty, unlike mullahs. The main reason they beg is to learn humility, but dervishes are prohibited to beg for their own good. They have to give the collected money to other poor people. Others work in common professions; Egyptian Qadiriyya – known in Turkey as Kadiri – are fishermen, for example.
Some classical writers indicate that the poverty of the dervish is not merely economic.