Declension table of ?kṛṣṇasūtra

Neuter	Singular	Dual	Plural
Nominative	kṛṣṇasūtram	kṛṣṇasūtre	kṛṣṇasūtrāṇi
Vocative	kṛṣṇasūtra	kṛṣṇasūtre	kṛṣṇasūtrāṇi
Accusative	kṛṣṇasūtram	kṛṣṇasūtre	kṛṣṇasūtrāṇi
Instrumental	kṛṣṇasūtreṇa	kṛṣṇasūtrābhyām	kṛṣṇasūtraiḥ
Dative	kṛṣṇasūtrāya	kṛṣṇasūtrābhyām	kṛṣṇasūtrebhyaḥ
Ablative	kṛṣṇasūtrāt	kṛṣṇasūtrābhyām	kṛṣṇasūtrebhyaḥ
Genitive	kṛṣṇasūtrasya	kṛṣṇasūtrayoḥ	kṛṣṇasūtrāṇām
Locative	kṛṣṇasūtre	kṛṣṇasūtrayoḥ	kṛṣṇasūtreṣu

Compound kṛṣṇasūtra -

Adverb -kṛṣṇasūtram -kṛṣṇasūtrāt