inmate

A resident of a dwelling that houses a number of occupants, especially a person confined to an institution, such as a prison or hospital.

One who is a mate or associate in the occupancy of a place; hence, an indweller; an associated lodger or inhabitant.

Dwelling in the same place; residing jointly.

One who lives in the same house or apartment with another; a fellow lodger.

Admitted as a dweller; resident; internal.