Declension table of viṣāstra

Neuter	Singular	Dual	Plural
Nominative	viṣāstram	viṣāstre	viṣāstrāṇi
Vocative	viṣāstra	viṣāstre	viṣāstrāṇi
Accusative	viṣāstram	viṣāstre	viṣāstrāṇi
Instrumental	viṣāstreṇa	viṣāstrābhyām	viṣāstraiḥ
Dative	viṣāstrāya	viṣāstrābhyām	viṣāstrebhyaḥ
Ablative	viṣāstrāt	viṣāstrābhyām	viṣāstrebhyaḥ
Genitive	viṣāstrasya	viṣāstrayoḥ	viṣāstrāṇām
Locative	viṣāstre	viṣāstrayoḥ	viṣāstreṣu

Compound viṣāstra -

Adverb -viṣāstram -viṣāstrāt