In Hindustani music (North Indian classical music), a gharānā is a system of social organisation in the Indian subcontinent, linking musicians or dancers by lineage or apprenticeship, and more importantly by adherence to a particular musical style. The word gharana comes from the Hindi word 'ghar' which is derived from the Sanskrit word Griha, which means 'house'. It typically refers to the place where the musical ideology originated; for example, some of the gharanas well known for singing khyals are: Dilli(Delhi), Agra, Gwalior, Indore, Atrauli-Jaipur, Kirana and Patiala. Four famous kathak gharanas are: Lucknow, Atrauli-Jaipur, Benares and Raigarh. Vocal gharanas Khyal gharanas The gharana system in khyal was rooted in the guru–shishya tradition and was similar to the Dhrupad Bani system. The gharana system was greatly influenced by the gradual fall of the Mughal Empire, which forced musicians to move from Delhi to princely states such as Gwalior, Lucknow, Hyderabad, Patiala and Rampur. The gharanas have distinct styles of presenting the khyal — how much to emphasize and how to enunciate the words of the composition, when to sing the sthayi and antara, whether to sing an unmetered alap in the beginning, what kinds of improvisations to use, how much importance to give to the rhythmic aspect, and so on. However, an individual performer from a gharana may choose to borrow appealing stylistic aspects of another gharana in his or her gayaki (singing style). There are ten prominent khyal gharanas, and they are: Dhrupad gharanas The dhrupad tradition includes four original styles: Dagarbani ("sadharani geeti") Gauharbani Khandarbani Nauharbani Today's surviving dhrupad traditions are descendants of the aforementioned four styles. Dagar gharana, founded by the Dagar family Bishnupur gharana, founded by Kirtankars in West Bengal (13th century) Darbhanga gharana, founded in Darbhanga, Bihar Bettiah gharana, founded in Bettiah, Bihar Talwandi gharana Mewati gharana, founded by Wahid Khan (Beenkar) and Ghagge Nazir Khan. Descended from Khandarbani gharana. Kalpi gharana Thumri gharanas In the Benares gharana, the words in the text of a song are musically embellished to bring out their meaning, while the Lucknow gharana presents intricately embellished and delicate thumris that are explicit in their eroticism. The principal feature of the thumri of the Patiala gharana is its incorporation of the tappa from the Punjab region. It is with this tappa element that the Patiala gharana makes its impact, departing from the khyal-dominated Benares thumris and the dance-oriented Lucknow thumris. The