Declension table of ?yayivas

Masculine	Singular	Dual	Plural
Nominative	yayivān	yayivāṃsau	yayivāṃsaḥ
Vocative	yayivan	yayivāṃsau	yayivāṃsaḥ
Accusative	yayivāṃsam	yayivāṃsau	yayuṣaḥ
Instrumental	yayuṣā	yayivadbhyām	yayivadbhiḥ
Dative	yayuṣe	yayivadbhyām	yayivadbhyaḥ
Ablative	yayuṣaḥ	yayivadbhyām	yayivadbhyaḥ
Genitive	yayuṣaḥ	yayuṣoḥ	yayuṣām
Locative	yayuṣi	yayuṣoḥ	yayivatsu

Compound yayivat -

Adverb -yayivas