Declension table of ?triṣaṃvatsara

Masculine	Singular	Dual	Plural
Nominative	triṣaṃvatsaraḥ	triṣaṃvatsarau	triṣaṃvatsarāḥ
Vocative	triṣaṃvatsara	triṣaṃvatsarau	triṣaṃvatsarāḥ
Accusative	triṣaṃvatsaram	triṣaṃvatsarau	triṣaṃvatsarān
Instrumental	triṣaṃvatsareṇa	triṣaṃvatsarābhyām	triṣaṃvatsaraiḥ triṣaṃvatsarebhiḥ
Dative	triṣaṃvatsarāya	triṣaṃvatsarābhyām	triṣaṃvatsarebhyaḥ
Ablative	triṣaṃvatsarāt	triṣaṃvatsarābhyām	triṣaṃvatsarebhyaḥ
Genitive	triṣaṃvatsarasya	triṣaṃvatsarayoḥ	triṣaṃvatsarāṇām
Locative	triṣaṃvatsare	triṣaṃvatsarayoḥ	triṣaṃvatsareṣu

Compound triṣaṃvatsara -

Adverb -triṣaṃvatsaram -triṣaṃvatsarāt