知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。is actually a prefix Meaning 50 %, partly, or a thing that is slightly inferior. The prefix demi– is derived in the Aged French word demi this means 50 %, derived in the Latin phrase dimidius. The prefix demi– isn't witnessed nearly as often sin