Declension table of ?pretvan

Masculine	Singular	Dual	Plural
Nominative	pretvā	pretvānau	pretvānaḥ
Vocative	pretvan	pretvānau	pretvānaḥ
Accusative	pretvānam	pretvānau	pretvanaḥ
Instrumental	pretvanā	pretvabhyām	pretvabhiḥ
Dative	pretvane	pretvabhyām	pretvabhyaḥ
Ablative	pretvanaḥ	pretvabhyām	pretvabhyaḥ
Genitive	pretvanaḥ	pretvanoḥ	pretvanām
Locative	pretvani	pretvanoḥ	pretvasu

Compound pretva -

Adverb -pretvam