What does immemorātiō mean in Latin?

immemorātiō, a noun, means “unmindfulness, forgetfulness”.

What is the genitive of immemorātiō?

The genitive singular is immemorātiōnis. immemorātiō is feminine, third declension.

noun · femininethird declension

immemorātiō f (genitive immemorātiōnis)

declension
form	singular	plural
nominative	immemorātiō inmemorātiō	immemorātiōnēs inmemorātiōnēs
genitive	immemorātiōnis inmemorātiōnis	immemorātiōnum inmemorātiōnum
dative	immemorātiōnī inmemorātiōnī	immemorātiōnibus inmemorātiōnibus
accusative	immemorātiōnem inmemorātiōnem	immemorātiōnēs inmemorātiōnēs
ablative	immemorātiōne inmemorātiōne	immemorātiōnibus inmemorātiōnibus
vocative	immemorātiō inmemorātiō	immemorātiōnēs inmemorātiōnēs

immĕmŏrātĭo (inm-), ōnis, f. immemor,

I. unmindfulness, forgetfulness (late Lat.): dei, Vulg. Sap. 14, 26.