This is the 1850th most frequent Swedish word.
jaga
"Jaga" means "to hunt" or "to chase" in English.
Here, 'jaga' refers to the act of hunting animals, which is its literal meaning.
Jag gillar att jaga älgar i skogen.
I like hunting moose in the forest.
In this sentence, 'jaga' is used metaphorically to mean chasing or striving for something intangible, like the truth.
De måste jaga efter sanningen.
They must chase after the truth.
The phrase 'jagar upp sig' uses 'jaga' idiomatically, meaning getting agitated or worked up.