Declension table of ?marmatra

Neuter	Singular	Dual	Plural
Nominative	marmatram	marmatre	marmatrāṇi
Vocative	marmatra	marmatre	marmatrāṇi
Accusative	marmatram	marmatre	marmatrāṇi
Instrumental	marmatreṇa	marmatrābhyām	marmatraiḥ
Dative	marmatrāya	marmatrābhyām	marmatrebhyaḥ
Ablative	marmatrāt	marmatrābhyām	marmatrebhyaḥ
Genitive	marmatrasya	marmatrayoḥ	marmatrāṇām
Locative	marmatre	marmatrayoḥ	marmatreṣu

Compound marmatra -

Adverb -marmatram -marmatrāt