This is the 8905th most frequent Catalan word.
excessiu
Excessive.
Here, 'excessiu' is used as an adjective to describe the high cost of the dinner, suggesting it was more than reasonable or acceptable.
L'import del sopar va ser excessiu.
The cost of the dinner was excessive.
In this sentence, 'excessiu' expresses the idea that the quantity of bands at the festival was perhaps over the optimal or expected number.
El nombre de conjunts musicals que actuaven en el festival era excessiu.
The number of musical bands performing at the festival was excessive.
Here, 'excessivament', the adverbial form derived from 'excessiu', is used to modify 'optimista', indicating that his optimism exceeds what might be considered normal or realistic.