Declension table of ?mamanthvas

Neuter	Singular	Dual	Plural
Nominative	mamanthvat	mamanthuṣī	mamanthvāṃsi
Vocative	mamanthvat	mamanthuṣī	mamanthvāṃsi
Accusative	mamanthvat	mamanthuṣī	mamanthvāṃsi
Instrumental	mamanthuṣā	mamanthvadbhyām	mamanthvadbhiḥ
Dative	mamanthuṣe	mamanthvadbhyām	mamanthvadbhyaḥ
Ablative	mamanthuṣaḥ	mamanthvadbhyām	mamanthvadbhyaḥ
Genitive	mamanthuṣaḥ	mamanthuṣoḥ	mamanthuṣām
Locative	mamanthuṣi	mamanthuṣoḥ	mamanthvatsu

Compound mamanthvat -

Adverb -mamanthvat