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CaseSingularPlural
Nominativeименительный · кто? что?вежливый вежливые the subject: who or what acts
Accusativeвинительный · кого? что?вежливый (inanimate) / вежливого (animate) вежливые (inanimate) / вежливых (animate) the direct object of the verb
Genitiveродительный · кого? чего?вежливого вежливых possession, absence, "of"-phrases
Dativeдательный · кому? чему?вежливому вежливым the receiver: to or for someone
Instrumentalтворительный · кем? чем?вежливым вежливыми the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?вежливом вежливых location and topics: in, at, about

Вежливый is an adjective: it copies the gender, number, and case of its noun. The table shows masculine and plural; feminine and neuter follow the same stem with their own endings.

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

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