Declension table of gurumukha

Neuter	Singular	Dual	Plural
Nominative	gurumukham	gurumukhe	gurumukhāṇi
Vocative	gurumukha	gurumukhe	gurumukhāṇi
Accusative	gurumukham	gurumukhe	gurumukhāṇi
Instrumental	gurumukheṇa	gurumukhābhyām	gurumukhaiḥ
Dative	gurumukhāya	gurumukhābhyām	gurumukhebhyaḥ
Ablative	gurumukhāt	gurumukhābhyām	gurumukhebhyaḥ
Genitive	gurumukhasya	gurumukhayoḥ	gurumukhāṇām
Locative	gurumukhe	gurumukhayoḥ	gurumukheṣu

Compound gurumukha -

Adverb -gurumukham -gurumukhāt