Declension table of ?haviṣṭva

Neuter	Singular	Dual	Plural
Nominative	haviṣṭvam	haviṣṭve	haviṣṭvāni
Vocative	haviṣṭva	haviṣṭve	haviṣṭvāni
Accusative	haviṣṭvam	haviṣṭve	haviṣṭvāni
Instrumental	haviṣṭvena	haviṣṭvābhyām	haviṣṭvaiḥ
Dative	haviṣṭvāya	haviṣṭvābhyām	haviṣṭvebhyaḥ
Ablative	haviṣṭvāt	haviṣṭvābhyām	haviṣṭvebhyaḥ
Genitive	haviṣṭvasya	haviṣṭvayoḥ	haviṣṭvānām
Locative	haviṣṭve	haviṣṭvayoḥ	haviṣṭveṣu

Compound haviṣṭva -

Adverb -haviṣṭvam -haviṣṭvāt