Knowledge

The fact of knowing about something; general understanding or familiarity with a subject, place, situation etc.

"His knowledge of Iceland was limited to what he'd seen on the Travel Channel."

Awareness of a particular fact or situation; a state of having been informed or made aware of something.

Intellectual understanding; the state of appreciating truth or information.

"Knowledge consists in recognizing the difference between good and bad decisions."

Familiarity or understanding of a particular skill, branch of learning etc.

"A secretary should have a good knowledge of shorthand."

To confess as true; to acknowledge.