An umbrella is made of a canopy and a handle.
For the canopy, draw a big arc and two smaller arcs on either side of it. Then repeat these three arcs lower down so that the central arc is narrower and the side ones are wider. All that's left is to connect the edges of the upper arcs into a canopy.
The handle comes down from the center of the canopy and ends with a hook. A nail sticks out of the top of the canopy.