Declension table of ?vayī

Feminine	Singular	Dual	Plural
Nominative	vayī	vayyau	vayyaḥ
Vocative	vayi	vayyau	vayyaḥ
Accusative	vayīm	vayyau	vayīḥ
Instrumental	vayyā	vayībhyām	vayībhiḥ
Dative	vayyai	vayībhyām	vayībhyaḥ
Ablative	vayyāḥ	vayībhyām	vayībhyaḥ
Genitive	vayyāḥ	vayyoḥ	vayīnām
Locative	vayyām	vayyoḥ	vayīṣu

Compound vayi - vayī -

Adverb -vayi