dekabr

/dekabr/

Cases

Singular — cases of dekabr
Case—plain
Nominativedekabrthe December
Genitivedekabrnıthe December's
Accusativedekabrnıthe December (as the object)
Dativedekabrğato the December
Locativedekabrdain / at the December
Ablativedekabrdanfrom the December

There is no plural of this word. The ending would attach like any other — it is the word, not the grammar, that refuses: this is not something Karachay counts.

The endings are the same ones the pronouns wear — that page explains when each case is used.