What is an umbra?

I suppose that this is at the root of word umbrella ie: it casts a shade

umbra shadow Philippines have an Amazing Shadow dancers called (penumbra)i stand be corrected

tia, Words so amazing, they can have power to cause change and point out prospective. They can curse or cause one to believe in a curse. Most of all God created with his Word ( s ). Control can be in words. wonderful words. ! ! !