劳驾 is formed by combining the character 劳, meaning "to labor" or "to trouble", with 驾, which originally meant "carriage" but in this context functions as an honorific term for the other person. The compound literally translates to "trouble your carriage", deriving from a historical polite expression used to ask someone to move their carriage or grant a favor, now used as a courteous phrase meaning "excuse me" or "please".