Declension table of ?kathānaka

Neuter	Singular	Dual	Plural
Nominative	kathānakam	kathānake	kathānakāni
Vocative	kathānaka	kathānake	kathānakāni
Accusative	kathānakam	kathānake	kathānakāni
Instrumental	kathānakena	kathānakābhyām	kathānakaiḥ
Dative	kathānakāya	kathānakābhyām	kathānakebhyaḥ
Ablative	kathānakāt	kathānakābhyām	kathānakebhyaḥ
Genitive	kathānakasya	kathānakayoḥ	kathānakānām
Locative	kathānake	kathānakayoḥ	kathānakeṣu

Compound kathānaka -

Adverb -kathānakam -kathānakāt