Knowledge
"Know":
Rooted in recognition, understanding, or perceiving truth or facts.
"-ledge":
"the act, state, or quality" of something.
Related to "pledge" and "privilege," it conveys possession or mastery.
Thus, "knowledge" translates to the state of being aware, understanding, or familiar with information, truth, or skill.
The PIE root *"ǵnō-" is also the source of words like:
"Agnostic": "Without knowledge."
"Ignorant": "Not knowing."