juju

This word is strongly connected with West African spiritual traditions, especially in places such as Nigeria and nearby regions. It can mean spiritual power itself, or an object, act, or practice believed to hold that power. A charm worn for protection, a ritual used for healing, or an item meant to bring luck might all be described this way. The idea is not just fantasy or decoration. In its original setting, it belongs to serious systems of belief and practice.

These practices and objects may be linked with protection from harm, healing, good fortune, success, or influence over events. Sometimes the power is thought to be in the object itself; sometimes it is understood as coming from the spiritual force connected to it and the ritual around it. Because of that, the word can refer both to a charm and to the unseen force behind it.

In modern English, the meaning has widened. People often use it informally to mean a mysterious force, a strong vibe, or simple good luck, as in "good juju." That use is easy to hear in conversation, sports, music, and pop culture. Still, the casual sense comes from a word with real religious and cultural weight, so it is best used with some care and respect.

So the word has two main lives in English. One is the older and more important sense tied to West African spiritual belief, ritual, and protective objects. The other is the everyday sense of luck, energy, or magic-like appeal. Both are common, but the second grows out of the first.