shaft
noun
1.
a line that forms the length of an arrow pointer
2.
3.
a long rod or pole (especially the handle of an implement or the body of a weapon like a spear or arrow)
4.
a column of light (as from a beacon)
5.
the main (mid) section of a long bone
7.
8.
a vertical passageway through a building (as for an elevator)
10.
a long vertical passage sunk into the earth, as for a mine or tunnel
11.
a revolving rod that transmits power or motion