Understanding is a relation between the knower and an object of understanding.
From the en.wikipedia.org
We believe the I-self to be the knower, witness or experiencer of the world.
From the allconsidering.com
A knower does not stand apart from the universe, they participate personally within it.
From the en.wikipedia.org
Shiva is the knower of all truth and instantly reads Sati's thoughts.
From the en.wikipedia.org
Knowledge does not depend so much on the object of knowledge as on the capacity of the knower.
From the en.wikipedia.org
The term Buddha literally means enlightened one, a knower.
From the theatlantic.com
It transcends the trinity of the knower, known and knowledge.
From the en.wikipedia.org
But the Self of that knower, who strives through these means, enters into the abode that is Brahman.
From the en.wikipedia.org
It will remain when there is no knower.
From the markvernon.com
More examples
A person who knows or apprehends
Knowledge is defined by the Oxford English Dictionary as (i) expertise, and skills acquired by a person through experience or education; the theoretical or practical understanding of a subject; (ii) what is known in a particular field or in total; facts and information; or (iii) awareness or ...