The character combination "从事" is formed conceptually by joining two independent ideas: 从 (cóng), which carries the core meaning of "to follow" or "to engage with", and 事 (shì), which signifies "an affair", "a matter", or "a professional undertaking". Together, they create a compound where the sense of "following" is directed toward a "task" or "profession", metaphorically conveying the idea of committing oneself to, or being occupied with, a specific line of work or activity.