Declension table of ?kārṣṇya

Neuter	Singular	Dual	Plural
Nominative	kārṣṇyam	kārṣṇye	kārṣṇyāni
Vocative	kārṣṇya	kārṣṇye	kārṣṇyāni
Accusative	kārṣṇyam	kārṣṇye	kārṣṇyāni
Instrumental	kārṣṇyena	kārṣṇyābhyām	kārṣṇyaiḥ
Dative	kārṣṇyāya	kārṣṇyābhyām	kārṣṇyebhyaḥ
Ablative	kārṣṇyāt	kārṣṇyābhyām	kārṣṇyebhyaḥ
Genitive	kārṣṇyasya	kārṣṇyayoḥ	kārṣṇyānām
Locative	kārṣṇye	kārṣṇyayoḥ	kārṣṇyeṣu

Compound kārṣṇya -

Adverb -kārṣṇyam -kārṣṇyāt