Declension table of ?śiśvivas

Neuter	Singular	Dual	Plural
Nominative	śiśvivat	śiśvuṣī	śiśvivāṃsi
Vocative	śiśvivat	śiśvuṣī	śiśvivāṃsi
Accusative	śiśvivat	śiśvuṣī	śiśvivāṃsi
Instrumental	śiśvuṣā	śiśvivadbhyām	śiśvivadbhiḥ
Dative	śiśvuṣe	śiśvivadbhyām	śiśvivadbhyaḥ
Ablative	śiśvuṣaḥ	śiśvivadbhyām	śiśvivadbhyaḥ
Genitive	śiśvuṣaḥ	śiśvuṣoḥ	śiśvuṣām
Locative	śiśvuṣi	śiśvuṣoḥ	śiśvivatsu

Compound śiśvivat -

Adverb -śiśvivas