origin:  Latin unda= a wave.
Paracelsus' philosophy, of the occult, sites an undine as an elemental being of the water -- one that can take female form -- such as a nymph or sprite, although they may also appear as a fish or a snake, slippery and mercurial like the very water they inhabit.
Unlike humans, despite their beauty & supernatural abilities, they're born without a soul and so will look to attach themselves to humans in order to achieve our perceived eternal nature. An undine may act as a servant, or romantic partner, and may even be able to create a child.
There is also a medical object with this name used to irrigate the eyes.
Remember kids: zorbing done incorrectly may result in death.
origin:  New Zealand Z= C20 (air cushion) + Orb= sphere + ing.
noun or verb
Did you ever wonder what it would be like to be inside a pin ball machine?
Zorbing looks like a sport from the future or game show torture on Japanese television. A human being -- or several -- depending on the design -- gets inside a giant, transparent, plastic ball while protected by a layer of air and is able to roll around.
Unlike the Russian video above, where two unfortunate souls went over the side of a mountain, this is normally done on a gentle slope on a specially worn path (additional guard fence is optional).