Declension table of ?chattvara

Masculine	Singular	Dual	Plural
Nominative	chattvaraḥ	chattvarau	chattvarāḥ
Vocative	chattvara	chattvarau	chattvarāḥ
Accusative	chattvaram	chattvarau	chattvarān
Instrumental	chattvareṇa	chattvarābhyām	chattvaraiḥ chattvarebhiḥ
Dative	chattvarāya	chattvarābhyām	chattvarebhyaḥ
Ablative	chattvarāt	chattvarābhyām	chattvarebhyaḥ
Genitive	chattvarasya	chattvarayoḥ	chattvarāṇām
Locative	chattvare	chattvarayoḥ	chattvareṣu

Compound chattvara -

Adverb -chattvaram -chattvarāt