Declension table of ādyantavat

Masculine	Singular	Dual	Plural
Nominative	ādyantavān	ādyantavantau	ādyantavantaḥ
Vocative	ādyantavan	ādyantavantau	ādyantavantaḥ
Accusative	ādyantavantam	ādyantavantau	ādyantavataḥ
Instrumental	ādyantavatā	ādyantavadbhyām	ādyantavadbhiḥ
Dative	ādyantavate	ādyantavadbhyām	ādyantavadbhyaḥ
Ablative	ādyantavataḥ	ādyantavadbhyām	ādyantavadbhyaḥ
Genitive	ādyantavataḥ	ādyantavatoḥ	ādyantavatām
Locative	ādyantavati	ādyantavatoḥ	ādyantavatsu

Compound ādyantavat -

Adverb -ādyantavantam