väderkorn

Swedish

By surface analysis, väder (“surrounding air”) ‎ korn (“grain”). Attested since the 15th century.

väderkorn n

scent ((good) ability to smell, of an animal, especially a dog)
1. nose, sense of smell, etc.
  en hund med utmärkt väderkorn
  a dog with an excellent nose
  
  ha känsligt väderkorn
  have a sensitive nose
  
  Hundarna använde sitt väderkorn
  The dogs used their sense of smell
  
  Förhoppningsvis kan han återfå sitt väderkorn
  Hopefully he can regain his (keen) sense of smell
(now uncommon) scent (picking up a scent)
få väderkorn på något
get scent of something
(figuratively) nose, flair ((good) ability to find out or discover things, "sniff out," intuit developments, etc.)
ha gott/bra väderkorn
have a keen nose

hennes politiska väderkorn
her flair for politics

More commonly as "få korn på" in (sense 2).