Compare each case across both numbers. The forms below are the noun's stored reference paradigm.
Singular and plural case forms for ум
Case
Singular
Plural
Nominative
ум
умы
Accusative
ум
умы
Genitive
ума
умов
Dative
уму
умам
Instrumental
умом
умами
Prepositional
уме
умах
Form pattern
How the forms are built
The paradigm above is authoritative. These notes expose a transparent ending change only when the stored declension family supports one.
Genitive · Singularум- + -а → ума
Keep the stored stem and add -а.
Show all case-build notes
Nominative · Singularум
This is the dictionary form used to identify the noun.Nominative · Pluralум- + -ы → умы
Keep the stored stem and add -ы.Accusative · Singularум- + zero ending → ум
Remove the zero ending; this form has a zero ending.Accusative · Pluralум- + -ы → умы
Keep the stored stem and add -ы.Genitive · Singularум- + -а → ума
Keep the stored stem and add -а.Genitive · Pluralум- + -ов → умов
Keep the stored stem and add -ов.Dative · Singularум- + -у → уму
Keep the stored stem and add -у.Dative · Pluralум- + -ам → умам
Keep the stored stem and add -ам.Instrumental · Singularум- + -ом → умом
Keep the stored stem and add -ом.Instrumental · Pluralум- + -ами → умами
Keep the stored stem and add -ами.Prepositional · Singularум- + -е → уме
Keep the stored stem and add -е.Prepositional · Pluralум- + -ах → умах
Keep the stored stem and add -ах.