The word "pukhta" is used in Arabic as «بختج», which is actually the Arabic pronunciation of "pukhta" itself. By this is meant that nabidh which is prepared by cooking it over fire, for example: talaa’, the explanation of which has already been mentioned previously. However, it is also necessary for this that it should not contain any intoxicant. [ديكهیے احاديث: 5718 ۔ 5730]
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 5751