Can You Solve These Near Impossible Riddles?

Name an eight letter word that has kst in the middle, in the beginning, and at the end.

Marking mortal privation, when firmly in place. An enduring summation, inscribed in my face.
What am I?

Some say we are red, some say we are green. Some play us, some spray us.
What are we?

Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not

I'm a word that's hardly there. Take away my start, and I'm an herbal flair. What am I?

I am a perching barrel, filled with meat, Taking hits from leaps and dives. Look inside, but do not eat, The meat in there is still alive!

Oh, what a surprise! Oh, what a miracle! It sprouted without a seed, It stood without a trunk.

The answer I give is yes, but what I mean is no. What was the question?