Declension table of ?trisāṃvatsara

Masculine	Singular	Dual	Plural
Nominative	trisāṃvatsaraḥ	trisāṃvatsarau	trisāṃvatsarāḥ
Vocative	trisāṃvatsara	trisāṃvatsarau	trisāṃvatsarāḥ
Accusative	trisāṃvatsaram	trisāṃvatsarau	trisāṃvatsarān
Instrumental	trisāṃvatsareṇa	trisāṃvatsarābhyām	trisāṃvatsaraiḥ trisāṃvatsarebhiḥ
Dative	trisāṃvatsarāya	trisāṃvatsarābhyām	trisāṃvatsarebhyaḥ
Ablative	trisāṃvatsarāt	trisāṃvatsarābhyām	trisāṃvatsarebhyaḥ
Genitive	trisāṃvatsarasya	trisāṃvatsarayoḥ	trisāṃvatsarāṇām
Locative	trisāṃvatsare	trisāṃvatsarayoḥ	trisāṃvatsareṣu

Compound trisāṃvatsara -

Adverb -trisāṃvatsaram -trisāṃvatsarāt