Declension table of ?mahasvat

Masculine	Singular	Dual	Plural
Nominative	mahasvān	mahasvantau	mahasvantaḥ
Vocative	mahasvan	mahasvantau	mahasvantaḥ
Accusative	mahasvantam	mahasvantau	mahasvataḥ
Instrumental	mahasvatā	mahasvadbhyām	mahasvadbhiḥ
Dative	mahasvate	mahasvadbhyām	mahasvadbhyaḥ
Ablative	mahasvataḥ	mahasvadbhyām	mahasvadbhyaḥ
Genitive	mahasvataḥ	mahasvatoḥ	mahasvatām
Locative	mahasvati	mahasvatoḥ	mahasvatsu

Compound mahasvat -

Adverb -mahasvantam