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CaseSingularPlural
Nominativeименительный · кто? что?высокий высокие the subject: who or what acts
Accusativeвинительный · кого? что?высокий (inanimate) / высокого (animate) высокие (inanimate) / высоких (animate) the direct object of the verb
Genitiveродительный · кого? чего?высокого высоких possession, absence, "of"-phrases
Dativeдательный · кому? чему?высокому высоким the receiver: to or for someone
Instrumentalтворительный · кем? чем?высоким высокими the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?высоком высоких location and topics: in, at, about

Высокий 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 высокий 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 высокий and every word like it with typed case endings, checked letter by letter.

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