Declension table of ?yayin

Neuter	Singular	Dual	Plural
Nominative	yayi	yayinī	yayīni
Vocative	yayin yayi	yayinī	yayīni
Accusative	yayi	yayinī	yayīni
Instrumental	yayinā	yayibhyām	yayibhiḥ
Dative	yayine	yayibhyām	yayibhyaḥ
Ablative	yayinaḥ	yayibhyām	yayibhyaḥ
Genitive	yayinaḥ	yayinoḥ	yayinām
Locative	yayini	yayinoḥ	yayiṣu

Compound yayi -

Adverb -yayi