This is the 705th most frequent Finnish word.
tätä
The Finnish word "tätä" means "this" in the partitive case.
In this question, the word 'tämä' (related form of 'tätä') identifies a specific, yet undefined, object or concept.
Mikä on tämä asia?
What is this thing?
The word 'tätä' appears in its form 'tästä,' indicating a context related to 'about this,' referring to 'topic.'
Haluan oppia enemmän tästä aiheesta.
I want to learn more about this topic.
In this sentence, 'tätä' (in the form 'tästä') is used to indicate something specific that is being liked, with the verb 'pitää'.