Vi > References for ‘visharga’
See also: vishála-very · vishanti · vishantiiti · vishárada · visháradah · vishate · vishati · Vishayá · visheś · Visheśa, viśheśa
[3] The second stage of psycho-spiritual [...] letters: aḿushvar (ḿ), visharga (ah), and chandrabindu (nasal [...] as kaḿ. Similarly, when visharga comes after the letter ka it is [...] above ka we pronounce it as kan.