Declension table of ?kṛṣṇamukha

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇamukhaḥ	kṛṣṇamukhau	kṛṣṇamukhāḥ
Vocative	kṛṣṇamukha	kṛṣṇamukhau	kṛṣṇamukhāḥ
Accusative	kṛṣṇamukham	kṛṣṇamukhau	kṛṣṇamukhān
Instrumental	kṛṣṇamukhena	kṛṣṇamukhābhyām	kṛṣṇamukhaiḥ kṛṣṇamukhebhiḥ
Dative	kṛṣṇamukhāya	kṛṣṇamukhābhyām	kṛṣṇamukhebhyaḥ
Ablative	kṛṣṇamukhāt	kṛṣṇamukhābhyām	kṛṣṇamukhebhyaḥ
Genitive	kṛṣṇamukhasya	kṛṣṇamukhayoḥ	kṛṣṇamukhānām
Locative	kṛṣṇamukhe	kṛṣṇamukhayoḥ	kṛṣṇamukheṣu

Compound kṛṣṇamukha -

Adverb -kṛṣṇamukham -kṛṣṇamukhāt