Answer:
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
I help engines spin and pants stay up.
I love spinach.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.