assassin
n. countable B2 Upper Intermediate Oxford US //əˈsæsən// UK //ɐsˈæsɪn// as·sas·sin
n. a person who illegally kills another person, often for money or as part of their job. You might hear this word in stories about spies or secret agents.
n. a person who commits murder covertly, typically for financial reward or as part of a clandestine operation. Common in fictional and historical contexts.
The assassin disappeared after completing the mission.
In the spy novel, the protagonist is haunted by the assassin who killed his former partner.
The historical account details how the assassin's use of poison and disguise made him a feared figure in the court.