Answer:
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.
Different lights do make me strange, thus into different sizes I will change
There is one word that stands the test of time and holds fast to the center of everything. Though everyone will try at least once in their life to move around this word, but in fact, unknowingly, they use it every moment of the day. Young or old, awake or in sleep, human or animal, this word stands fast. It belongs to everyone, to all living things, but no one can master it. The word is?
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
What is so fragile that saying its name breaks it?