Declension table of ?advayas

Masculine	Singular	Dual	Plural
Nominative	advayān	advayāṃsau	advayāṃsaḥ
Vocative	advayan	advayāṃsau	advayāṃsaḥ
Accusative	advayāṃsam	advayāṃsau	advayasaḥ
Instrumental	advayasā	advayobhyām	advayobhiḥ
Dative	advayase	advayobhyām	advayobhyaḥ
Ablative	advayasaḥ	advayobhyām	advayobhyaḥ
Genitive	advayasaḥ	advayasoḥ	advayasām
Locative	advayasi	advayasoḥ	advayaḥsu

Compound advayas -

Adverb -advayas