GRAMMATICAL CATEGORY OF TRUNKLESS
Trunkless is an adjective. The adjective is the word that accompanies the noun to determine or qualify it.
What kind of noun is trunk?
[countable] a large strong box with a lid used for storing or transporting clothes, books, etc.
What does the word pedestal?
A pedestal is a base or foundation that supports something like a statue or work of art. ... Think of the physical stand or support when you use pedestal figuratively to mean a place of superiority. If you put someone on a pedestal, you honor that person or place him or her above you, as you might a piece of valued art.