4x4

In Britain, the term "tetraplegia" is used to described the condition of paralysis of all four limbs, or, from the neck down. Now, in the U.S., we use the term "quadraplegia." It turns out that the British, being better schooled in regard to word roots and the classical languages, use the prefix "tetra" because it is Greek and therefore makes a more sensible pair with the root "plegia," which is also Greek (tetra means four, while plegia means blow or strike), than the Latin-based "quadra."