идея (ideya) - idea
Every form of the Russian noun идея: 6 cases, singular and plural, stress marked.
| Case | Singular | Plural | |
|---|---|---|---|
| Nominativeименительный · кто? что? | идея | идеи | the subject: who or what acts |
| Accusativeвинительный · кого? что? | идею | идеи | the direct object of the verb |
| Genitiveродительный · кого? чего? | идеи | идей | possession, absence, "of"-phrases |
| Dativeдательный · кому? чему? | идее | идеям | the receiver: to or for someone |
| Instrumentalтворительный · кем? чем? | идеей | идеями | the tool or companion: with, by |
| Prepositionalпредложный · о ком? о чём? | идее | идеях | location and topics: in, at, about |
Идея is a feminine noun; the ending pattern above repeats across most feminine nouns, so every table you learn makes the next one cheaper.
Look up any other word in the Russian declension tool, see where идея ranks in the most common Russian words, or start from Russian cases explained if the table above is new territory. More vocabulary lives in Russian words by topic and Russian phrases.
12 forms is a table. Using them is a skill.
Slova drills идея and every word like it with typed case endings, checked letter by letter.