suth door
One of the doors of a parish church, and generally the most important one. The word “suth” is most probably the old form of south, and refers to the fact that the southern door was that for the entrance of the congregation, and that where persons accused of crime might take oath that they were innocent, as well as that where notices of ecclesiastical ceremonials, feat days, and the like, were put up. (Sturgis, 1900)