Declension table of ?kṛṣṇopaniṣad

Feminine	Singular	Dual	Plural
Nominative	kṛṣṇopaniṣat	kṛṣṇopaniṣadau	kṛṣṇopaniṣadaḥ
Vocative	kṛṣṇopaniṣat	kṛṣṇopaniṣadau	kṛṣṇopaniṣadaḥ
Accusative	kṛṣṇopaniṣadam	kṛṣṇopaniṣadau	kṛṣṇopaniṣadaḥ
Instrumental	kṛṣṇopaniṣadā	kṛṣṇopaniṣadbhyām	kṛṣṇopaniṣadbhiḥ
Dative	kṛṣṇopaniṣade	kṛṣṇopaniṣadbhyām	kṛṣṇopaniṣadbhyaḥ
Ablative	kṛṣṇopaniṣadaḥ	kṛṣṇopaniṣadbhyām	kṛṣṇopaniṣadbhyaḥ
Genitive	kṛṣṇopaniṣadaḥ	kṛṣṇopaniṣadoḥ	kṛṣṇopaniṣadām
Locative	kṛṣṇopaniṣadi	kṛṣṇopaniṣadoḥ	kṛṣṇopaniṣatsu

Compound kṛṣṇopaniṣat -

Adverb -kṛṣṇopaniṣat