Declension table of ?mattara

Neuter	Singular	Dual	Plural
Nominative	mattaram	mattare	mattarāṇi
Vocative	mattara	mattare	mattarāṇi
Accusative	mattaram	mattare	mattarāṇi
Instrumental	mattareṇa	mattarābhyām	mattaraiḥ
Dative	mattarāya	mattarābhyām	mattarebhyaḥ
Ablative	mattarāt	mattarābhyām	mattarebhyaḥ
Genitive	mattarasya	mattarayoḥ	mattarāṇām
Locative	mattare	mattarayoḥ	mattareṣu

Compound mattara -

Adverb -mattaram -mattarāt