The word 上岸 is formed by combining the character 上, meaning "to ascend" or "to go up", with the character 岸, meaning "shore" or "bank". This creates a verb-object compound where 上 acts as the verb describing the action and 岸 serves as the object indicating the destination, resulting in the literal meaning "to go ashore". The word's formation is straightforward, deriving its sense directly from the semantic contribution of each character.