This is the 3226th most frequent Spanish word.
asesinado
Killed or murdered.
Here, 'asesinado' is the participle form of the verb 'asesinar', used as an adjective to describe 'the murdered man' as part of the noun phrase.
El detective investiga el caso del hombre asesinado.
The detective is investigating the case of the murdered man.
In this sentence, 'asesinado' is used as part of a passive voice construction formed with the verb 'haber sido' to express an action directed toward the subject, indicating a completed action.
El gobierno lamenta que el periodista haya sido asesinado.
The government regrets that the journalist has been murdered.
Although 'asesinado' itself is not used directly in this sentence, an understanding of its connection to 'asesinato' (murder) as a related noun form can be contextualized.