pain / pane / peine [pein]
pain – n. & v. – n. – 1. sensation associated with some form of injury; 2. precise effort; 3. a nuisance; v. – to cause another to hurt
pane – n. – 1. a sheet of glass; 2. a page of stamps; 3. a rectangle in a checkered pattern
peine – n. – Law a form of severe corporal punishment