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CaseSingularPlural
Nominativeименительный · кто? что?свитер свитеры the subject: who or what acts
Accusativeвинительный · кого? что?свитер свитеры the direct object of the verb
Genitiveродительный · кого? чего?свитера свитеров possession, absence, "of"-phrases
Dativeдательный · кому? чему?свитеру свитерам the receiver: to or for someone
Instrumentalтворительный · кем? чем?свитером свитерами the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?свитере свитерах location and topics: in, at, about

Свитер is a masculine noun; the ending pattern above repeats across most masculine nouns, so every table you learn makes the next one cheaper.

Look up any other word in the Russian declension tool, see where свитер 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 свитер and every word like it with typed case endings, checked letter by letter.

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