Declension table of ?siṣmivas

Neuter	Singular	Dual	Plural
Nominative	siṣmivat	siṣmuṣī	siṣmivāṃsi
Vocative	siṣmivat	siṣmuṣī	siṣmivāṃsi
Accusative	siṣmivat	siṣmuṣī	siṣmivāṃsi
Instrumental	siṣmuṣā	siṣmivadbhyām	siṣmivadbhiḥ
Dative	siṣmuṣe	siṣmivadbhyām	siṣmivadbhyaḥ
Ablative	siṣmuṣaḥ	siṣmivadbhyām	siṣmivadbhyaḥ
Genitive	siṣmuṣaḥ	siṣmuṣoḥ	siṣmuṣām
Locative	siṣmuṣi	siṣmuṣoḥ	siṣmivatsu

Compound siṣmivat -

Adverb -siṣmivas