Complex sentence: In its euphemistic meanings, a garderobe is either a close stool or a primitive toilet in a medieval castle or other building, usually a simple hole discharging to the outside.
Split into simpler sentences: In its euphemistic meanings, a garderobe is either a close stool or a medieval or Renaissance lavatory or toilet. In a medieval castle or other building, a garderobe usually was a simple hole discharging to the outside.