Nuhi refers to one of the positions of Senmin (unfree people) against Ryomin (free people) under the ritsuryo system (the system of centralized government based on the ritsuryo code), and was equivalent to a servile class.
奴婢（ぬひ）は、律令制における、良民（自由民）に対する賤民（自由のない民）の中の位置づけの一つであり、奴隷階級に相当する。