Declension table of ?puravāstu

Neuter	Singular	Dual	Plural
Nominative	puravāstu	puravāstunī	puravāstūni
Vocative	puravāstu	puravāstunī	puravāstūni
Accusative	puravāstu	puravāstunī	puravāstūni
Instrumental	puravāstunā	puravāstubhyām	puravāstubhiḥ
Dative	puravāstune	puravāstubhyām	puravāstubhyaḥ
Ablative	puravāstunaḥ	puravāstubhyām	puravāstubhyaḥ
Genitive	puravāstunaḥ	puravāstunoḥ	puravāstūnām
Locative	puravāstuni	puravāstunoḥ	puravāstuṣu

Compound puravāstu -

Adverb -puravāstu