Declension table of ?ṛṣvavīra

Neuter	Singular	Dual	Plural
Nominative	ṛṣvavīram	ṛṣvavīre	ṛṣvavīrāṇi
Vocative	ṛṣvavīra	ṛṣvavīre	ṛṣvavīrāṇi
Accusative	ṛṣvavīram	ṛṣvavīre	ṛṣvavīrāṇi
Instrumental	ṛṣvavīreṇa	ṛṣvavīrābhyām	ṛṣvavīraiḥ
Dative	ṛṣvavīrāya	ṛṣvavīrābhyām	ṛṣvavīrebhyaḥ
Ablative	ṛṣvavīrāt	ṛṣvavīrābhyām	ṛṣvavīrebhyaḥ
Genitive	ṛṣvavīrasya	ṛṣvavīrayoḥ	ṛṣvavīrāṇām
Locative	ṛṣvavīre	ṛṣvavīrayoḥ	ṛṣvavīreṣu

Compound ṛṣvavīra -

Adverb -ṛṣvavīram -ṛṣvavīrāt