The word "镶嵌" is formed by combining the characters "镶" and "嵌", each contributing related meanings to the whole. "镶" denotes the action of inlaying or setting, often involving the attachment of one material onto another, such as adding a border or embedding a jewel. "嵌" refers to embedding or inserting an object into a recess so that it sits flush. Together, they form a compound word that precisely describes the process of inlaying, where pieces are fitted into a base to create a cohesive design.