Answer:
It is by nature, soft as silk; A puffy cloud, white as milk; Snow tops this tropical crop; The dirtiest part of a mop
My first is a body of water. My second is me. My third came before. My fourth before all three. My fifth sounds like my first. My sixth is in a lake. Put all six together to make an animal that will keep you awake.
I can be written, I can be spoken, I can be exposed, I can be broken.
Fatherless and motherless. Born without sin, roared when it came into the world. And never spoke again.
Vikings use this for warmth.
What is so fragile that saying its name breaks it?