Ununderstanding vs. Understanding

Difference Between Ununderstanding and Understanding
Ununderstandingnoun
Failure to understand; incomprehension.
Understandingnoun
(uncountable) Mental, sometimes emotional process of comprehension, assimilation of knowledge, which is subjective by its nature.
Ununderstandingadjective
Not understanding.
Understandingnoun
(countable) Reason or intelligence, ability to grasp the full meaning of knowledge, ability to infer.
Understandingnoun
(countable) Opinion, judgement or outlook.
According to my understanding, the situation is quite perilous. I wonder if you see it this way, too.Understandingnoun
(countable) An informal contract; mutual agreement.
I thought we had an understanding - you do the dishes, and I throw the trash.Understandingnoun
(countable) A reconciliation of differences.
The parties of the negotiation have managed to come to an understanding.Understandingnoun
(uncountable) Sympathy.
He showed much understanding for my problems when he heard about my past.Understandingadjective
Showing compassion.
Understandingadjective
(dated) Knowing; skilful.
Understandingverb
present participle of understand
Understandingnoun
the cognitive condition of someone who understands;
he has virtually no understanding of social cause and effectUnderstandingnoun
the statement (oral or written) of an exchange of promises;
they had an agreement that they would not interfere in each other's businessthere was an understanding between management and the workersUnderstandingnoun
an inclination to support or be loyal to or to agree with an opinion;
his sympathies were always with the underdogI knew I could count on his understandingUnderstandingnoun
the capacity for rational thought or inference or discrimination;
we are told that man is endowed with reason and capable of distinguishing good from evilUnderstandingadjective
characterized by understanding based on comprehension and discernment and empathy;
an understanding friend