Shadow
Shade
noun
The kanji and the word are exactly the same. That means they share meanings as well. Also means shadow.
Look at a shadow. It's long, surprisingly long. It's in the shape of a cage (かげ), because that's what is producing the long shadow. Check out each bar of the cage. Maybe you're inside the cage? Whatever is going on, a long shadow is being created by the cage and shade.
陰でこそこそ私の陰口言うの、止めてくれない？言いたいことがあるなら、はっきり言ってよ！
Can’t you stop making fun of me behind my back? If you have something to say, say it to my face.