Murderous (adjective)

1. Characterized by or capable of murder.
2. Extremely violent or cruel.
3. Having the intent to kill.

Origin:

From middle english word "murderous", from old english "morderful" ("murderous, full of murder"), from "morder" ("murder") + "-ful" ("full of"), equivalent to "murder" + "-ful".

Examples:

1. The police are searching for a murderous criminal who escaped from prison.
2. The new film is a murderous thriller about a serial killer.
3. His murderous thoughts were making him feel paranoid.
4. The soldier had a murderous look on his face as he aimed his weapon.
5. The king's enemies plotted to overthrow him in a murderous coup.