N-
to be aware; to realize; to mentally grasp.
I did not happen to be aware of when he arrived.
I wasn't aware of when he arrived.
We were not aware that there was a war.
We had no idea that there was a war.
idiom
to make aware, so that others are not fooled.
This is translated in a variety of ways.
Make [us] aware this just was sleeping. [Said by one who does not believe another has really just awakened from sleep.]