What is the meaning of Botme?

The lowest section of something; the bottom, especially of water:

1. The bottom portion of a ship's hull, or the line of wood running along it.
2. A dell or valley; an indentation in the land.
3. The bottom of a depression or hole; the extreme reaches of an organ.

The bottom portion of a ship's hull, or the line of wood running along it.

A dell or valley; an indentation in the land.

The bottom of a depression or hole; the extreme reaches of an organ.

That which yarn is wound around.

Source: wiktionary.org