Declension table of ?sahasrin

Masculine	Singular	Dual	Plural
Nominative	sahasrī	sahasriṇau	sahasriṇaḥ
Vocative	sahasrin	sahasriṇau	sahasriṇaḥ
Accusative	sahasriṇam	sahasriṇau	sahasriṇaḥ
Instrumental	sahasriṇā	sahasribhyām	sahasribhiḥ
Dative	sahasriṇe	sahasribhyām	sahasribhyaḥ
Ablative	sahasriṇaḥ	sahasribhyām	sahasribhyaḥ
Genitive	sahasriṇaḥ	sahasriṇoḥ	sahasriṇām
Locative	sahasriṇi	sahasriṇoḥ	sahasriṣu

Compound sahasri -

Adverb -sahasri