The word "船坞" is formed by combining the character "船", meaning "ship", which itself is a pictophonetic character composed of the semantic component "舟" (boat) and the phonetic component "㕣", with the character "坞", meaning "dock", also a pictophonetic character composed of the semantic component "土" (earth/land) and the phonetic component "乌". Together, they create a compound word where "船" denotes the object (ship) and "坞" denotes the structure or place (dock), resulting in the meaning "shipyard" or "dock".