Declension table of ?upanidhāna

Neuter	Singular	Dual	Plural
Nominative	upanidhānam	upanidhāne	upanidhānāni
Vocative	upanidhāna	upanidhāne	upanidhānāni
Accusative	upanidhānam	upanidhāne	upanidhānāni
Instrumental	upanidhānena	upanidhānābhyām	upanidhānaiḥ
Dative	upanidhānāya	upanidhānābhyām	upanidhānebhyaḥ
Ablative	upanidhānāt	upanidhānābhyām	upanidhānebhyaḥ
Genitive	upanidhānasya	upanidhānayoḥ	upanidhānānām
Locative	upanidhāne	upanidhānayoḥ	upanidhāneṣu

Compound upanidhāna -

Adverb -upanidhānam -upanidhānāt