Declension table of ?antarvastra

Neuter	Singular	Dual	Plural
Nominative	antarvastram	antarvastre	antarvastrāṇi
Vocative	antarvastra	antarvastre	antarvastrāṇi
Accusative	antarvastram	antarvastre	antarvastrāṇi
Instrumental	antarvastreṇa	antarvastrābhyām	antarvastraiḥ
Dative	antarvastrāya	antarvastrābhyām	antarvastrebhyaḥ
Ablative	antarvastrāt	antarvastrābhyām	antarvastrebhyaḥ
Genitive	antarvastrasya	antarvastrayoḥ	antarvastrāṇām
Locative	antarvastre	antarvastrayoḥ	antarvastreṣu

Compound antarvastra -

Adverb -antarvastram -antarvastrāt