Declension table of ?cirastha

Neuter	Singular	Dual	Plural
Nominative	cirastham	cirasthe	cirasthāni
Vocative	cirastha	cirasthe	cirasthāni
Accusative	cirastham	cirasthe	cirasthāni
Instrumental	cirasthena	cirasthābhyām	cirasthaiḥ
Dative	cirasthāya	cirasthābhyām	cirasthebhyaḥ
Ablative	cirasthāt	cirasthābhyām	cirasthebhyaḥ
Genitive	cirasthasya	cirasthayoḥ	cirasthānām
Locative	cirasthe	cirasthayoḥ	cirastheṣu

Compound cirastha -

Adverb -cirastham -cirasthāt