Declension table of ?śiśiṣvas

Neuter	Singular	Dual	Plural
Nominative	śiśiṣvat	śiśiṣuṣī	śiśiṣvāṃsi
Vocative	śiśiṣvat	śiśiṣuṣī	śiśiṣvāṃsi
Accusative	śiśiṣvat	śiśiṣuṣī	śiśiṣvāṃsi
Instrumental	śiśiṣuṣā	śiśiṣvadbhyām	śiśiṣvadbhiḥ
Dative	śiśiṣuṣe	śiśiṣvadbhyām	śiśiṣvadbhyaḥ
Ablative	śiśiṣuṣaḥ	śiśiṣvadbhyām	śiśiṣvadbhyaḥ
Genitive	śiśiṣuṣaḥ	śiśiṣuṣoḥ	śiśiṣuṣām
Locative	śiśiṣuṣi	śiśiṣuṣoḥ	śiśiṣvatsu

Compound śiśiṣvat -

Adverb -śiśiṣvat