Declension table of ?sañcayitva

Neuter	Singular	Dual	Plural
Nominative	sañcayitvam	sañcayitve	sañcayitvāni
Vocative	sañcayitva	sañcayitve	sañcayitvāni
Accusative	sañcayitvam	sañcayitve	sañcayitvāni
Instrumental	sañcayitvena	sañcayitvābhyām	sañcayitvaiḥ
Dative	sañcayitvāya	sañcayitvābhyām	sañcayitvebhyaḥ
Ablative	sañcayitvāt	sañcayitvābhyām	sañcayitvebhyaḥ
Genitive	sañcayitvasya	sañcayitvayoḥ	sañcayitvānām
Locative	sañcayitve	sañcayitvayoḥ	sañcayitveṣu

Compound sañcayitva -

Adverb -sañcayitvam -sañcayitvāt