Declension table of ?karastha

Neuter	Singular	Dual	Plural
Nominative	karastham	karasthe	karasthāni
Vocative	karastha	karasthe	karasthāni
Accusative	karastham	karasthe	karasthāni
Instrumental	karasthena	karasthābhyām	karasthaiḥ
Dative	karasthāya	karasthābhyām	karasthebhyaḥ
Ablative	karasthāt	karasthābhyām	karasthebhyaḥ
Genitive	karasthasya	karasthayoḥ	karasthānām
Locative	karasthe	karasthayoḥ	karastheṣu

Compound karastha -

Adverb -karastham -karasthāt