Declension table of ?kadarthya

Neuter	Singular	Dual	Plural
Nominative	kadarthyam	kadarthye	kadarthyāni
Vocative	kadarthya	kadarthye	kadarthyāni
Accusative	kadarthyam	kadarthye	kadarthyāni
Instrumental	kadarthyena	kadarthyābhyām	kadarthyaiḥ
Dative	kadarthyāya	kadarthyābhyām	kadarthyebhyaḥ
Ablative	kadarthyāt	kadarthyābhyām	kadarthyebhyaḥ
Genitive	kadarthyasya	kadarthyayoḥ	kadarthyānām
Locative	kadarthye	kadarthyayoḥ	kadarthyeṣu

Compound kadarthya -

Adverb -kadarthyam -kadarthyāt