Frequency: The word is one of the 1500 most common words in English.
1.
If you are ~ of something, you know about it.
Smokers are well ~ of the dangers to their own health...
He should have been ~ of what his junior officers were doing...
He must have been ~ that my parents’ marriage was breaking up.
? un~
ADJ: v-link ADJ, ADJ of n, ADJ that
~ness
The 1980s brought an ~ness of green issues...
N-UNCOUNT: usu N of/about n, N that
2.
If you are ~ of something, you realize that it is present or is happening because you hear it, see it, smell it, or feel it.
She was acutely ~ of the noise of the city...
Jane was suddenly ~ that she was digging her nails into her thigh.
= conscious
? un~
ADJ: v-link ADJ, ADJ of n, ADJ that
3.
Someone who is ~ notices what is happening around them or happening in the place where they live.
They are politically very ~.
ADJ: v-link ADJ
~ness
He introduced radio to the school to increase the children’s ~ness.
N-UNCOUNT