confine

verb
  1. To keep or restrict someone or something within certain limits of space, scope, quantity, or time. verb
    The patient was confined to bed for several weeks after the surgery.
    The discussion was confined to the topic of climate change.
  2. To imprison or keep in a place, especially as a form of punishment. verb
    The prisoner was confined in a small cell for the duration of his sentence.
    During the war, many were confined in internment camps.
  3. The borders or boundaries of a space or area. noun
    The river forms the southern confine of the property.
    The confine of the city limits the expansion of new developments.