Declension table of ?kāṣṭhaka

Neuter	Singular	Dual	Plural
Nominative	kāṣṭhakam	kāṣṭhake	kāṣṭhakāni
Vocative	kāṣṭhaka	kāṣṭhake	kāṣṭhakāni
Accusative	kāṣṭhakam	kāṣṭhake	kāṣṭhakāni
Instrumental	kāṣṭhakena	kāṣṭhakābhyām	kāṣṭhakaiḥ
Dative	kāṣṭhakāya	kāṣṭhakābhyām	kāṣṭhakebhyaḥ
Ablative	kāṣṭhakāt	kāṣṭhakābhyām	kāṣṭhakebhyaḥ
Genitive	kāṣṭhakasya	kāṣṭhakayoḥ	kāṣṭhakānām
Locative	kāṣṭhake	kāṣṭhakayoḥ	kāṣṭhakeṣu

Compound kāṣṭhaka -

Adverb -kāṣṭhakam -kāṣṭhakāt