This is the 417th most frequent Catalan word.
costa
"Coast" or "slope."
In this sentence, 'costa' refers to the coastline or seashore, meaning the geographical area.
La costa catalana és molt maca.
The Catalan coast is very beautiful.
Here, 'costa' expresses difficulty or effort required to achieve something, specifying it metaphorically.
Costa una mica entendre aquest concepte.
It takes a bit of effort to understand this concept.
In this context, 'costa' refers to the monetary expense required to pay for something.