Declension table of kathaka

Neuter	Singular	Dual	Plural
Nominative	kathakam	kathake	kathakāni
Vocative	kathaka	kathake	kathakāni
Accusative	kathakam	kathake	kathakāni
Instrumental	kathakena	kathakābhyām	kathakaiḥ
Dative	kathakāya	kathakābhyām	kathakebhyaḥ
Ablative	kathakāt	kathakābhyām	kathakebhyaḥ
Genitive	kathakasya	kathakayoḥ	kathakānām
Locative	kathake	kathakayoḥ	kathakeṣu

Compound kathaka -

Adverb -kathakam -kathakāt