mugger

The term 'mugger' originates from the slang verb 'mug', meaning to strike in the face or to rob violently, which emerged in the 19th century. Its exact origin is obscure but may be connected to the earlier use of 'mug' to mean a face or a grimace, suggesting an attack aimed at the face. The agentive suffix '-er', of Germanic origin, was appended to form a noun for the person committing the act. Thus, the word's journey from potential slang for a face to a term for a violent street robber illustrates a semantic shift grounded in the physical nature of the crime.

The word 'mugger' is a simplex form derived from the verb 'mug'. The verb 'mug' (to attack and rob) is of unknown origin, possibly from thieves' slang. The suffix '-er' is an agent noun suffix from Old English '-ere', used to denote a person who performs an action.