Igh
The word igh (pronounced "ih") is the epitome of everything and nothing at the same time.
Origins
Igh is said to have been born somewhere between the end of time and the beginning of time in Romania. A mathematician who had discovered time travel stumbled across the void separating different dimensions into "Dimension Igh", where all of the inhabitants replaced any noun with the word "igh". This utterly confounded the mathematician, and he eventually died of confusion 3.999999999999999999999999999999999999999999999 days after returning from his "little journey", as he liked to call it. Right before he died, he gave a four hour lecture to a bunch of grapes on the meaning of "igh". Fourtunately for the grapes, who were failing the mathematician's class, his son was listening in the other room, and took down every word.
Mathematical Use
The number "igh" is defined as "any number greater than 2 and less than 4, but neither 2 or 4".