The word "下榻" is formed by combining the character "下" (xià), meaning "down" or "descend", with "榻" (tà), meaning "couch" or "bed". It originates from an ancient historical anecdote where a host would lower or set up a couch ("榻") for a distinguished guest to stay, with "下" indicating the action of placing down. This literal act of preparing a bed for a visitor evolved into the compound term meaning "to stay overnight" or "to lodge".