Declension table of ?pārśvastha

Neuter	Singular	Dual	Plural
Nominative	pārśvastham	pārśvasthe	pārśvasthāni
Vocative	pārśvastha	pārśvasthe	pārśvasthāni
Accusative	pārśvastham	pārśvasthe	pārśvasthāni
Instrumental	pārśvasthena	pārśvasthābhyām	pārśvasthaiḥ
Dative	pārśvasthāya	pārśvasthābhyām	pārśvasthebhyaḥ
Ablative	pārśvasthāt	pārśvasthābhyām	pārśvasthebhyaḥ
Genitive	pārśvasthasya	pārśvasthayoḥ	pārśvasthānām
Locative	pārśvasthe	pārśvasthayoḥ	pārśvastheṣu

Compound pārśvastha -

Adverb -pārśvastham -pārśvasthāt