Declension table of pūrvasara

Masculine	Singular	Dual	Plural
Nominative	pūrvasaraḥ	pūrvasarau	pūrvasarāḥ
Vocative	pūrvasara	pūrvasarau	pūrvasarāḥ
Accusative	pūrvasaram	pūrvasarau	pūrvasarān
Instrumental	pūrvasareṇa	pūrvasarābhyām	pūrvasaraiḥ pūrvasarebhiḥ
Dative	pūrvasarāya	pūrvasarābhyām	pūrvasarebhyaḥ
Ablative	pūrvasarāt	pūrvasarābhyām	pūrvasarebhyaḥ
Genitive	pūrvasarasya	pūrvasarayoḥ	pūrvasarāṇām
Locative	pūrvasare	pūrvasarayoḥ	pūrvasareṣu

Compound pūrvasara -

Adverb -pūrvasaram -pūrvasarāt