Declension table of ?tarkasādhya

Neuter	Singular	Dual	Plural
Nominative	tarkasādhyam	tarkasādhye	tarkasādhyāni
Vocative	tarkasādhya	tarkasādhye	tarkasādhyāni
Accusative	tarkasādhyam	tarkasādhye	tarkasādhyāni
Instrumental	tarkasādhyena	tarkasādhyābhyām	tarkasādhyaiḥ
Dative	tarkasādhyāya	tarkasādhyābhyām	tarkasādhyebhyaḥ
Ablative	tarkasādhyāt	tarkasādhyābhyām	tarkasādhyebhyaḥ
Genitive	tarkasādhyasya	tarkasādhyayoḥ	tarkasādhyānām
Locative	tarkasādhye	tarkasādhyayoḥ	tarkasādhyeṣu

Compound tarkasādhya -

Adverb -tarkasādhyam -tarkasādhyāt