Declension table of ?trisāṃvatsara

Neuter	Singular	Dual	Plural
Nominative	trisāṃvatsaram	trisāṃvatsare	trisāṃvatsarāṇi
Vocative	trisāṃvatsara	trisāṃvatsare	trisāṃvatsarāṇi
Accusative	trisāṃvatsaram	trisāṃvatsare	trisāṃvatsarāṇi
Instrumental	trisāṃvatsareṇa	trisāṃvatsarābhyām	trisāṃvatsaraiḥ
Dative	trisāṃvatsarāya	trisāṃvatsarābhyām	trisāṃvatsarebhyaḥ
Ablative	trisāṃvatsarāt	trisāṃvatsarābhyām	trisāṃvatsarebhyaḥ
Genitive	trisāṃvatsarasya	trisāṃvatsarayoḥ	trisāṃvatsarāṇām
Locative	trisāṃvatsare	trisāṃvatsarayoḥ	trisāṃvatsareṣu

Compound trisāṃvatsara -

Adverb -trisāṃvatsaram -trisāṃvatsarāt