An Aticāra (partial transgression) of the conduct qua Jñāna (knowledge or learning);
to pronounce erroneously the vowels and consonants with different acuteness in accent etc. and softness or hardness in sound.
ghoṣahīnam- udāttādighoṣarahitam.
(Āva 4.8 HāVṛ 2 p. 161)