Answer:
I contain six letters minus one and you got twelve.
I'm tall I'm round and hollow Seems to get chewed a bit But you'll rarely see me unless the other end is lit.
Marking mortal privation when firmly in place. An enduring summation inscribed in my face.
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
To cross the water, I'm the way. For water I'm above, I touch it not and truth to say, I neither swim nor move. What am I?
What language does a billboard speak?