If you are jaded, something that used to light you up now leaves you flat. You have had so much of it — parties, praise, travel, even success — that the next round does not feel new. It is not ordinary tiredness after a long day; it is a worn-out kind of boredom, the feeling of “I have seen this already.” People use it more about adults than children, and it can sound a little grown-up or newspaper-like: jaded voters, a jaded star, a jaded traveller who no longer gasps at the view. Though actually, it does not have to mean you hate the thing; the spark has simply gone. The picture behind the word is an old sense of jade: a worn-out horse that cannot be pushed any further (and, from the 1500s, a rude word for a woman). That tired-horse picture is the parent; the green stone called jade is a different word that only looks the same.