Declension table of ?vastṛ

Masculine	Singular	Dual	Plural
Nominative	vastā	vastārau	vastāraḥ
Vocative	vastaḥ	vastārau	vastāraḥ
Accusative	vastāram	vastārau	vastṝn
Instrumental	vastrā	vastṛbhyām	vastṛbhiḥ
Dative	vastre	vastṛbhyām	vastṛbhyaḥ
Ablative	vastuḥ	vastṛbhyām	vastṛbhyaḥ
Genitive	vastuḥ	vastroḥ	vastṝṇām
Locative	vastari	vastroḥ	vastṛṣu

Compound vastṛ -

Adverb -vastṛ