‘Pakistan’ is an acronym.
The word translates as ‘land of the pure’- but that’s just a coincidence, because the country’s name is based on the Muslim territories of Northern India in the 1930s: (P)unjabi, (A)fghani, (K)ashmiri, (S)indhi, and Balochis(TAN), with an extra ‘I’ to make it easier to pronounce.