Täysiikä
Täysiikää is not a standard dictionary entry in Finnish; the common term for the concept is täysi-ikä, with täysiikää being an inflected form that may appear in a sentence. The underlying concept, however, is the state of being of full legal age, or adulthood, as recognized by law.
Täysi-ikä refers to the legal status in which a person is considered capable of making binding decisions
In practical terms, those who are not yet täysi-ikä usually require guardianship or parental consent for certain
Etymology and usage notes: täysi-ikä combines täysi (full, complete) and ikä (age). The term is widely used