Essive case

The essive or similaris case (abbreviated ess) carries the meaning of a temporary location or state of being, often equivalent to the English "as a (child)".

In the Finnish language, this case is marked by adding "-na/-nä" to the stem of the noun.

In the Estonian language, this case is marked by adding "-na" to the genitive case.

In Finnish, it is also used for specifying times, days and dates when something happens. For example: maanantaina -> "on Monday", kuudentena joulukuuta -> "on the 6th of December". Some expressions use the essive in the ancient locative meaning, e.g. "at home" is kotona. Observe the similarity to English "at home/in my home":