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CaseSingularPlural
Nominativeименительный · кто? что?удобный удобные the subject: who or what acts
Accusativeвинительный · кого? что?удобный (inanimate) / удобного (animate) удобные (inanimate) / удобных (animate) the direct object of the verb
Genitiveродительный · кого? чего?удобного удобных possession, absence, "of"-phrases
Dativeдательный · кому? чему?удобному удобным the receiver: to or for someone
Instrumentalтворительный · кем? чем?удобным удобными the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?удобном удобных location and topics: in, at, about

Удобный 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 удобный 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 удобный and every word like it with typed case endings, checked letter by letter.

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