Declension table of ?kṛṣṇārjaka

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇārjakaḥ	kṛṣṇārjakau	kṛṣṇārjakāḥ
Vocative	kṛṣṇārjaka	kṛṣṇārjakau	kṛṣṇārjakāḥ
Accusative	kṛṣṇārjakam	kṛṣṇārjakau	kṛṣṇārjakān
Instrumental	kṛṣṇārjakena	kṛṣṇārjakābhyām	kṛṣṇārjakaiḥ kṛṣṇārjakebhiḥ
Dative	kṛṣṇārjakāya	kṛṣṇārjakābhyām	kṛṣṇārjakebhyaḥ
Ablative	kṛṣṇārjakāt	kṛṣṇārjakābhyām	kṛṣṇārjakebhyaḥ
Genitive	kṛṣṇārjakasya	kṛṣṇārjakayoḥ	kṛṣṇārjakānām
Locative	kṛṣṇārjake	kṛṣṇārjakayoḥ	kṛṣṇārjakeṣu

Compound kṛṣṇārjaka -

Adverb -kṛṣṇārjakam -kṛṣṇārjakāt