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CaseSingularPlural
Nominativeименительный · кто? что?ёж ежи the subject: who or what acts
Accusativeвинительный · кого? что?ежа ежей the direct object of the verb
Genitiveродительный · кого? чего?ежа ежей possession, absence, "of"-phrases
Dativeдательный · кому? чему?ежу ежам the receiver: to or for someone
Instrumentalтворительный · кем? чем?ежом ежами the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?еже ежах location and topics: in, at, about

Ёж is animate, so its accusative copies the genitive: the form after "I see..." matches the form after "of".

Look up any other word in the Russian declension tool, see where ёж 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.

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