What does arrack mean?
The definition of arrack
Ar”rack, n.
Etym: [Ar. araq sweat, juice, spirituous liquor, fr. araqa to sweat. Cf. Rack arrack.]

A name in the East Indies and the Indian islands for all ardent spirits. Arrack is often distilled from a fermented mixture of rice, molasses, and palm wine of the cocoanut tree or the date palm, etc.