The word 干扰 is formed through the conceptual combination of its two component characters: 干, which carries an ancient sense of "to intervene" or "to involve oneself in", and 扰, meaning "to disturb" or "to throw into disorder". Their merger creates a metaphorical fusion, where the act of intrusive involvement (干) directly causes a state of disruption or confusion (扰), picturing an external force entering and upsetting a system's normal operation to produce the abstract meaning of "interference" or "jam".