Declension table of ?arthakara

Neuter	Singular	Dual	Plural
Nominative	arthakaram	arthakare	arthakarāṇi
Vocative	arthakara	arthakare	arthakarāṇi
Accusative	arthakaram	arthakare	arthakarāṇi
Instrumental	arthakareṇa	arthakarābhyām	arthakaraiḥ
Dative	arthakarāya	arthakarābhyām	arthakarebhyaḥ
Ablative	arthakarāt	arthakarābhyām	arthakarebhyaḥ
Genitive	arthakarasya	arthakarayoḥ	arthakarāṇām
Locative	arthakare	arthakarayoḥ	arthakareṣu

Compound arthakara -

Adverb -arthakaram -arthakarāt