a mast
its also the part where the main sail is attached
body
The main part of our body that is attached to our legs and arms is called the torso. It includes the chest, abdomen, and pelvis.
The name shared by both the external part of the ear and the muscular pouches attached to the atria of the heart is "auricle."
ball
Zik and Zak are on the Main Lava Isle, Go to the little "isle" that is attached to the main lava isle. (where princess pookie lives) They are on the southern part of that smaller part of the isle.
The mast is part of a boat. It is a vertical pole on a ship which supports the sails.
Why Me, or think of the main part
The sails or the engine, depending on the yacht.
The base part of a word is the main part that carries the core meaning. It is the word without any prefixes or suffixes attached.
The word "masts" is a noun. It refers to the upright spars on a ship that support the sails.
That would have to be the heart