The Essive Case (-na/-nä)
In Finnish, the essive case is used to describe a temporary state, condition, or a role someone is acting in. In English, this often translates to "as a..." or "working as a...".
To form the essive case, add the ending -na or -nä to the inflected vowel stem of the noun, following the rules of vowel harmony.
Working in a Profession
A very common use of the essive case is to describe someone's current job or temporary position. When you want to say "I am working as a waiter", you attach -na or -nä to the profession.
Unlike many other cases, the essive case ending does not trigger consonant gradation. A strong consonant like the double kk in kokki (cook) remains unchanged: kokkina.
To say someone is not working as something, simply negate the verb olla (to be) as usual. The noun still keeps its essive ending.
Life Stages and Conditions
Because the essive implies a state that has a beginning and an end, it is naturally used to talk about life stages (like "as a baby" or "as an adult") or temporary situations.
If a word ends in -nen, remember that its stem changes to -se- before adding case endings. For example, aikuinen (adult) becomes aikuisena, and eläkeläinen (pensioner) becomes eläkeläisenä.
Other temporary statuses, like being a visiting tourist or a student trainee, also take the essive case: