SJAU () [ʃæʉ] - major effort, toil.
7 - seven (from Old Norse sjau]) - is the natural number that comes after six and before eight
Almost all mammals have seven cervical vertebrae
The number of notes in the traditional Western diatonic scale (major or minor) is seven
If god exitst, there where seven days of creation
In Islam there is seven levels of hell
While in Buddhism, Buddha walked 7 steps at his birth
A week has seven days.