sketch: [17] Sketch comes ultimately from Greek skhédios ‘impromptu’. This reached English by a rather roundabout route: via Latin schedius, which led to a Vulgar Latin verb schediāre ‘do hastily’, source of Italian schizzare ‘make a sketch’, which in turn produced the noun schizzo ‘sketch’, borrowed into English via German skizze or Dutch schets. [sketch etymology, sketch origin, 英语词源]