Declension table of ?kaṣṭakara

Masculine	Singular	Dual	Plural
Nominative	kaṣṭakaraḥ	kaṣṭakarau	kaṣṭakarāḥ
Vocative	kaṣṭakara	kaṣṭakarau	kaṣṭakarāḥ
Accusative	kaṣṭakaram	kaṣṭakarau	kaṣṭakarān
Instrumental	kaṣṭakareṇa	kaṣṭakarābhyām	kaṣṭakaraiḥ kaṣṭakarebhiḥ
Dative	kaṣṭakarāya	kaṣṭakarābhyām	kaṣṭakarebhyaḥ
Ablative	kaṣṭakarāt	kaṣṭakarābhyām	kaṣṭakarebhyaḥ
Genitive	kaṣṭakarasya	kaṣṭakarayoḥ	kaṣṭakarāṇām
Locative	kaṣṭakare	kaṣṭakarayoḥ	kaṣṭakareṣu

Compound kaṣṭakara -

Adverb -kaṣṭakaram -kaṣṭakarāt