masculine in grammatical gender, the noun declines as neuter, i.e. *авти (*avti) does not exist. Pre- and postpositive adjectives are nonetheless declined...
(imenovȃlnik) ávto ávti ávta genitive (rodȋlnik) ávta ávt ávt dative (dajȃlnik) ávtu ávtoma ávtom accusative (tožȋlnik) ávto ávti ávta locative (mẹ̑stnik)...