Declension table of ?mahāpattra

Masculine	Singular	Dual	Plural
Nominative	mahāpattraḥ	mahāpattrau	mahāpattrāḥ
Vocative	mahāpattra	mahāpattrau	mahāpattrāḥ
Accusative	mahāpattram	mahāpattrau	mahāpattrān
Instrumental	mahāpattreṇa	mahāpattrābhyām	mahāpattraiḥ mahāpattrebhiḥ
Dative	mahāpattrāya	mahāpattrābhyām	mahāpattrebhyaḥ
Ablative	mahāpattrāt	mahāpattrābhyām	mahāpattrebhyaḥ
Genitive	mahāpattrasya	mahāpattrayoḥ	mahāpattrāṇām
Locative	mahāpattre	mahāpattrayoḥ	mahāpattreṣu

Compound mahāpattra -

Adverb -mahāpattram -mahāpattrāt