What is Confine ?
Confine is (verb) 1. to keep in one small place The tigers were confined in a small cage with no room to move around. to confine someone to barracks to forced a soldier to stay in barracks when others are out to confine someone to bed to forced a sick or injured person to stay in bed She wanted to get up, but the doctor has confined her to bed. 2. to limit Make sure you confine your answer to the subject in the question.
source: Easier English, Student Dictionary Upper Intermediate Level