the (technical) knowledge and skill required to do something
be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
know how to do or perform something
be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
have firsthand knowledge of states, situations, emotions, or sensations
accept (someone) to be what is claimed or accept his power and authority
have fixed in the mind
the fact of being aware of information that is known to few people
know the nature or character of
perceive as familiar
