vacuum
investigate
daub - to cover or coat with soft, adhesive matter, as plaster or mud
I've is a word that means I have. I'll is a word that means I will.
Desperate is the word that means willing to do anything.
inevitable
Shatter.
The word you are looking for is "density". Density refers to how tightly packed the matter in a substance is.
perhaps the word, res. which means: Matter, affair, thing, circumstance
The science word that means the quantity of matter in a body is "mass." Mass is a measurement of the amount of matter in an object, and it is commonly expressed in units such as kilograms or grams.
"Matter" is a possibility.
thesis, matter
-ly is the suffix of crossly. It means in the matter of.
By definition, "dark" (look up what that word means!) matter can not be seen.
I am thinking that it is oral, but I have never seen it as part of a word, or as a root, for that matter.
Solution
Refraction.