Declension table of ?sahavatsa

Neuter	Singular	Dual	Plural
Nominative	sahavatsam	sahavatse	sahavatsāni
Vocative	sahavatsa	sahavatse	sahavatsāni
Accusative	sahavatsam	sahavatse	sahavatsāni
Instrumental	sahavatsena	sahavatsābhyām	sahavatsaiḥ
Dative	sahavatsāya	sahavatsābhyām	sahavatsebhyaḥ
Ablative	sahavatsāt	sahavatsābhyām	sahavatsebhyaḥ
Genitive	sahavatsasya	sahavatsayoḥ	sahavatsānām
Locative	sahavatse	sahavatsayoḥ	sahavatseṣu

Compound sahavatsa -

Adverb -sahavatsam -sahavatsāt