The word "镌镂" is formed by combining the characters "镌" and "镂", each contributing a related meaning of carving or engraving. "镌" specifically refers to engraving or cutting into hard surfaces such as stone or metal, often for inscriptions, while "镂" denotes carving with intricate detail, such as in openwork or decorative patterns. Together, they form a compound word that emphasizes the act and craftsmanship of detailed engraving.