Declension table of ?antastha

Neuter	Singular	Dual	Plural
Nominative	antastham	antasthe	antasthāni
Vocative	antastha	antasthe	antasthāni
Accusative	antastham	antasthe	antasthāni
Instrumental	antasthena	antasthābhyām	antasthaiḥ
Dative	antasthāya	antasthābhyām	antasthebhyaḥ
Ablative	antasthāt	antasthābhyām	antasthebhyaḥ
Genitive	antasthasya	antasthayoḥ	antasthānām
Locative	antasthe	antasthayoḥ	antastheṣu

Compound antastha -

Adverb -antastham -antasthāt