ᴱQ. voiceless spirants combined with [ɸ] became [f]; [{ɸxʷxθʲθs}θʲ] > [f]

Reference ✧ PE12/021.0200

Order ()

Before [f] became [v] except before stressed vowel

Phonetic Rule Elements

[{ɸxʷxθʲθs}θʲ] > [f]