Declension table of ?tadarthaka

Neuter	Singular	Dual	Plural
Nominative	tadarthakam	tadarthake	tadarthakāni
Vocative	tadarthaka	tadarthake	tadarthakāni
Accusative	tadarthakam	tadarthake	tadarthakāni
Instrumental	tadarthakena	tadarthakābhyām	tadarthakaiḥ
Dative	tadarthakāya	tadarthakābhyām	tadarthakebhyaḥ
Ablative	tadarthakāt	tadarthakābhyām	tadarthakebhyaḥ
Genitive	tadarthakasya	tadarthakayoḥ	tadarthakānām
Locative	tadarthake	tadarthakayoḥ	tadarthakeṣu

Compound tadarthaka -

Adverb -tadarthakam -tadarthakāt