This is the 11677th most frequent Spanish word.
furioso
Furioso: Furious; extremely angry.
In this sentence, 'furioso' expresses an intense feeling of anger due to a frustrating situation (losing keys).
Estoy furioso porque perdí mis llaves.
I am furious because I lost my keys.
'Furioso' is used metaphorically here to describe the sea's violent and chaotic state during a storm, not actual anger.
El mar estaba furioso durante la tormenta.
The sea was furious during the storm.
Here, 'furioso' describes someone's eyes showing intense and visible anger due to a misunderstanding.