Declension table of ?pratyavasthāna

Neuter	Singular	Dual	Plural
Nominative	pratyavasthānam	pratyavasthāne	pratyavasthānāni
Vocative	pratyavasthāna	pratyavasthāne	pratyavasthānāni
Accusative	pratyavasthānam	pratyavasthāne	pratyavasthānāni
Instrumental	pratyavasthānena	pratyavasthānābhyām	pratyavasthānaiḥ
Dative	pratyavasthānāya	pratyavasthānābhyām	pratyavasthānebhyaḥ
Ablative	pratyavasthānāt	pratyavasthānābhyām	pratyavasthānebhyaḥ
Genitive	pratyavasthānasya	pratyavasthānayoḥ	pratyavasthānānām
Locative	pratyavasthāne	pratyavasthānayoḥ	pratyavasthāneṣu

Compound pratyavasthāna -

Adverb -pratyavasthānam -pratyavasthānāt