know

be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about

I know that the President lied to the people

know how to do or perform something

She knows how to knit

be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt

I know that I left the key on the table

be familiar or acquainted with a person or an object

She doesn't know this composer

have firsthand knowledge of states, situations, emotions, or sensations

I know the feeling!