This is the 925th most frequent Swedish word.
ren
The Swedish word "ren" means "clean" or "reindeer," depending on context.
Here, "ren" describes "luft" (air), serving as an adjective meaning "clean".
Ren luft är viktig för hälsan.
Clean air is important for health.
In this sentence, "renar" is the plural form of "ren" (reindeer), serving as a noun.
Renar strövar fritt i norra Sverige.
Reindeer roam freely in northern Sweden.
Here, "ren" is used figuratively, meaning "mere" or "pure" when describing "slump" (coincidence).