From Wiktionary, the free dictionary
From Sanskrit स्वाहा (svāhā).
ស្វាហៈ • (svahaʼ)
- it is right; it is correct (used at the beginning or end of religious or magical formulae)
- may it be powerful!; may it be glorious! (used by Brahmans during a ceremony in honor of Agni, ព្រះអគ្គី (prĕəhʼkkii), god of fire)