Declension table of ?kaṣṭakara

Neuter	Singular	Dual	Plural
Nominative	kaṣṭakaram	kaṣṭakare	kaṣṭakarāṇi
Vocative	kaṣṭakara	kaṣṭakare	kaṣṭakarāṇi
Accusative	kaṣṭakaram	kaṣṭakare	kaṣṭakarāṇi
Instrumental	kaṣṭakareṇa	kaṣṭakarābhyām	kaṣṭakaraiḥ
Dative	kaṣṭakarāya	kaṣṭakarābhyām	kaṣṭakarebhyaḥ
Ablative	kaṣṭakarāt	kaṣṭakarābhyām	kaṣṭakarebhyaḥ
Genitive	kaṣṭakarasya	kaṣṭakarayoḥ	kaṣṭakarāṇām
Locative	kaṣṭakare	kaṣṭakarayoḥ	kaṣṭakareṣu

Compound kaṣṭakara -

Adverb -kaṣṭakaram -kaṣṭakarāt