Answer:
What five-letter word becomes shorter when you add two letters to it?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I row quickly with four oars but never comes out from under my own roof.
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
Although I may have eyes I cannot see. I have a round brown face with lots of acne.
A little house full of meat, no door to go in and eat.