Declension table of ?rahastha

Neuter	Singular	Dual	Plural
Nominative	rahastham	rahasthe	rahasthāni
Vocative	rahastha	rahasthe	rahasthāni
Accusative	rahastham	rahasthe	rahasthāni
Instrumental	rahasthena	rahasthābhyām	rahasthaiḥ
Dative	rahasthāya	rahasthābhyām	rahasthebhyaḥ
Ablative	rahasthāt	rahasthābhyām	rahasthebhyaḥ
Genitive	rahasthasya	rahasthayoḥ	rahasthānām
Locative	rahasthe	rahasthayoḥ	rahastheṣu

Compound rahastha -

Adverb -rahastham -rahasthāt