This is the 614th most frequent Italian word.
ucciso
Killed.
Here, 'ucciso' is used as the past participle of the verb 'uccidere' (to kill), indicating an action completed by someone (the killer) towards another person (the victim).
Il detective ha scoperto chi ha ucciso la vittima.
The detective discovered who killed the victim.
In this sentence, 'ucciso' operates as a past participle in a passive voice construction ('è stato ucciso'), conveying that the action of killing was performed on the protagonist by someone else.
Il libro racconta come il protagonista è stato ucciso nel finale.
The book narrates how the protagonist was killed in the ending.
Here, 'ucciso' is applied directly as the past participle of 'uccidere,' describing a cause-and-effect relationship between the accident and the death of the passengers.