Declension table of ?viṣṭara

Masculine	Singular	Dual	Plural
Nominative	viṣṭaraḥ	viṣṭarau	viṣṭarāḥ
Vocative	viṣṭara	viṣṭarau	viṣṭarāḥ
Accusative	viṣṭaram	viṣṭarau	viṣṭarān
Instrumental	viṣṭareṇa	viṣṭarābhyām	viṣṭaraiḥ viṣṭarebhiḥ
Dative	viṣṭarāya	viṣṭarābhyām	viṣṭarebhyaḥ
Ablative	viṣṭarāt	viṣṭarābhyām	viṣṭarebhyaḥ
Genitive	viṣṭarasya	viṣṭarayoḥ	viṣṭarāṇām
Locative	viṣṭare	viṣṭarayoḥ	viṣṭareṣu

Compound viṣṭara -

Adverb -viṣṭaram -viṣṭarāt