ओष्ठ्य (Hindi) comes from Sanskrit ओष्ठ्य, from Sanskrit ओष्ठ, from Proto-Indo-Aryan HáwHṣṭʰas, from Proto-Indo-Iranian HáwHštʰas, from Proto-Indo-European h₃éh₁os — mouth.
ओष्ठ्य (Hindi): labial, osthya