This is the 346th most frequent Finnish word.
liittyy
"Liittyy" means "is related to" or "is connected to" in English.
The verb 'liittyy' in this sentence means 'pertains to' or 'is related to', signifying a connection between the subject 'asia' (matter) and the object 'oppituntiimme' (our lesson).
Tämä asia liittyy oppituntiimme.
This matter pertains to our lesson.
Here, 'liittyy' means 'joins', indicating the action of becoming part of the group.
Hän liittyy seuraamme myöhemmin.
He/She will join our group later.
The word 'liittyy' is used here to express a connection or relevance between the subject (this matter) and the predicate (his previous work).