The word is a modern compound, formed within English by combining two established native words. 'Strike', in the labor sense, evolved from the 18th-century phrase 'to strike work', meaning to cease labor as a collective action. 'Break' carries its ancient Germanic sense of violating or interrupting a continuity. The compound 'strikebreaker' literally means "one who breaks a strike," directly mapping the agent's function to the word's structure. It emerged in the late 19th century alongside the growth of organized labor movements, providing a concise label for a figure central to industrial disputes.

Structure: strike (work stoppage) + break (to interrupt) + er (agent suffix) - strike: From Old English strīcan (to go, move, stroke). In this compound, it refers to the modern sense of a concerted work stoppage. - break: From Old English brecan (to break, shatter, violate). Here, it functions with the sense of "to interrupt or defeat the action of." - er: An agentive suffix from Old English -ere, used to form nouns denoting a person who performs an action.