See the entire entry for ˀsr vb. to bind; to prohibit

BT Tan 22a(15) : מאי עובדך אמ׳ ליה זנדיקאי ואסרנא גבריא לחודיהו ונשיא לחודיהו : what is your job? He said to him: jailer and I imprison men by themselves and women by themselves †

See the entire entry for zndqnˀ n.m. jailer