This is the 698th most frequent Danish word.
bredt
"Bredt" means "broadly" or "widely" in English.
Here, "bredt" describes the physical width of the road as an adjective.
Vejen er meget bredt.
The road is very wide.
In this sentence, "bredt" is used adverbially to describe the manner of smiling.
Hun smilte bredt af glæde.
She smiled broadly with joy.
This usage of "bredt" modifies the scope of the discussion, again as an adjective with a metaphorical meaning.