大工
だいく · daiku · JLPT N2 · noun
carpenter
🔨 大 (big) + 工 (work): big work, the craft of building houses = carpenter
大工 combines 大 big and 工 work or craft. Historically it named a skilled master builder of wooden structures, which is why it means carpenter today.
大 — pictograph of a person with arms outstretched
大 is a pictograph showing a person standing with arms and legs spread wide. The outstretched arms suggest 'big' or 'great', extending from the literal image of a large stance to abstract meanings like important or grand. It is one of the oldest characters, found on oracle bones.