Declension table of ?kaṣṭatara

Masculine	Singular	Dual	Plural
Nominative	kaṣṭataraḥ	kaṣṭatarau	kaṣṭatarāḥ
Vocative	kaṣṭatara	kaṣṭatarau	kaṣṭatarāḥ
Accusative	kaṣṭataram	kaṣṭatarau	kaṣṭatarān
Instrumental	kaṣṭatareṇa	kaṣṭatarābhyām	kaṣṭataraiḥ kaṣṭatarebhiḥ
Dative	kaṣṭatarāya	kaṣṭatarābhyām	kaṣṭatarebhyaḥ
Ablative	kaṣṭatarāt	kaṣṭatarābhyām	kaṣṭatarebhyaḥ
Genitive	kaṣṭatarasya	kaṣṭatarayoḥ	kaṣṭatarāṇām
Locative	kaṣṭatare	kaṣṭatarayoḥ	kaṣṭatareṣu

Compound kaṣṭatara -

Adverb -kaṣṭataram -kaṣṭatarāt