Declension table of ?seyivas

Neuter	Singular	Dual	Plural
Nominative	seyivat	seyuṣī	seyivāṃsi
Vocative	seyivat	seyuṣī	seyivāṃsi
Accusative	seyivat	seyuṣī	seyivāṃsi
Instrumental	seyuṣā	seyivadbhyām	seyivadbhiḥ
Dative	seyuṣe	seyivadbhyām	seyivadbhyaḥ
Ablative	seyuṣaḥ	seyivadbhyām	seyivadbhyaḥ
Genitive	seyuṣaḥ	seyuṣoḥ	seyuṣām
Locative	seyuṣi	seyuṣoḥ	seyivatsu

Compound seyivat -

Adverb -seyivas