Learning Korean 9: I was right!

It's a not-so-great thing to be right about, but I was right that the verb 무섭다 (museopta) is confusing. I could never remember whether it means "to be scared" or "to be scary." It seemed like there were plenty of other similar pairs I had had trouble with, but I looked up 무섭다 many times.

At my lesson today, I brought it up with my teacher. Her answer: it can mean both, so my confusion is completely warranted. What a ... relief? Context determines what meaning is intended, and certain situations trigger different verb forms that prevent ambiguity. For instance:

괴물이 집에 왔는데 난 무서웠어! (A monster came to the house! I was scared/scary.) Only "scared" makes sense given the context. 

괴물이 무서워해. (A monster is scared/scary.) Because the (let's call it) 3rd-Person Internal State form of the verb is used—무서워 + 하다—the only possible interpretation is that this is a statement about the monster's internal state: The monster is scared. 

Then there's what happens when the adjectival form (무서운) is used, but I've already forgotten which meaning this suggests. "Scary," I think. 

(There might also be subject/topic nuances, too, but if so, I've forgotten them, and probably didn't understand them anyway.)