It is a riddle.
It is the strongest force,
to resist your force,
and yet it is not a force.
It never accelerates,
but it is always moving.
It never rests, and
it never gets tired.
It has been defined many ways,
but no one can quite capture it.
What is it?
Yes, Dust. I might be wrong in bringing in the topic of gravity. If everything is subject to acceleration, that implies that whatever things that those people in these comments in regard of air, wind & all other substances in this earth are too subject to acceleration too. This is due to all the things on this earth are subject to the spining of the earth. Thus, Dust should not point particularly to me that I am wrong and he should mention that all those people that mention wind, air, or whatsoever substances on this earth are wrong.
It is mentioned that it is the strongest force. How could the time be the strongest force that could resist your force? Do you we our age is increasing and it could not stop your age to advance? As it could not stop your time to advance, how could it resist your force too. You too might try to link up time to the solution. However, it is a wild imagination too.
The phrase, it never gets tired, in the question is some kind of wild imagination. How could the question bring our human feeling into the explanation of time?
When you mention the time is not a force, what do you mean the force? What is the definition of the word, force, to you and how you relate the force to the question?
If the answer is the time, the question mentions that it has been defined in many ways. What are the different kind of definitions of time that we have currently?
When you mention we can't capture the time, what do you really mean then?