Declension table of ?ṛtumukha

Neuter	Singular	Dual	Plural
Nominative	ṛtumukham	ṛtumukhe	ṛtumukhāni
Vocative	ṛtumukha	ṛtumukhe	ṛtumukhāni
Accusative	ṛtumukham	ṛtumukhe	ṛtumukhāni
Instrumental	ṛtumukhena	ṛtumukhābhyām	ṛtumukhaiḥ
Dative	ṛtumukhāya	ṛtumukhābhyām	ṛtumukhebhyaḥ
Ablative	ṛtumukhāt	ṛtumukhābhyām	ṛtumukhebhyaḥ
Genitive	ṛtumukhasya	ṛtumukhayoḥ	ṛtumukhānām
Locative	ṛtumukhe	ṛtumukhayoḥ	ṛtumukheṣu

Compound ṛtumukha -

Adverb -ṛtumukham -ṛtumukhāt