The characteristic of being covert.
A silent and reserved nature.
Followed by of: discretion or restraint in the use of something.
Often followed by to: hesitancy or reluctance (to do something).
Avoidance of saying or reluctance to say too much; discretion, tight-lippedness; (countable) an instance of acting in this manner.
To deliberately not listen or pay attention to; to disregard, to ignore.