Noun reference

идея

idea

Feminine · Inanimate

Feminine -я family

Case paradigm

Singular and plural together

Compare each case across both numbers. The forms below are the noun's stored reference paradigm.

Singular and plural case forms for идея
Case	Singular	Plural
Nominative	идея	идеи
Accusative	идею	идеи
Genitive	идеи	идей
Dative	идее	идеям
Instrumental	идеейLong instrumental variant: идеею Accepted in practice	идеями
Prepositional	идее	идеях

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 · Singular идея → идеи

The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Show all case-build notes

Nominative · Singular идея This is the dictionary form used to identify the noun.

Nominative · Plural идея → идеи The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Accusative · Singular идея → идею The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Accusative · Plural идея → идеи The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Genitive · Singular идея → идеи The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Genitive · Plural идея → идей The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Dative · Singular идея → идее The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Dative · Plural идея → идеям The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Instrumental · Singular идея → идеей The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Instrumental · Plural идея → идеями The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Prepositional · Singular идея → идее The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Prepositional · Plural идея → идеях The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.