Early European peoples used a word in various forms - evese, obasa, opa, etc., -which meant the rim, or edge, of something, like the edge of a field; it came in time to be applied wholly to the gutter which runs along the edge of a roof. (Our "over" comes from this root.) "Dropper" had an origin among the same languages, and meant that which drips, or dribbles, like water dropping from a thawing icicle. Eavesdrop, therefore, was the water which dripped from the eaves. If a man set himself to listen through a window or keyhole to what was going on in a house he had to stand so close that the eavesdropping would fall upon him, for which reason all prying persons, seeking by secret means what they have no business to know, came to be called eavesdroppers.