1) Agnise 2) Agnize 3) Cognise 4) Know 5) Realize 1) Become conscious of 2) Cognise 3) Know 4) To perceive 
• (v. t.) To know or perceive; to recognize.
Cog'nize transitive verb [ Confer Cognizant , Recognize .] To know or perceive; to recognize. « The reasoning faculty can deal with no facts until they are cognized by it. H. Spencer. » 
cognise verb 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`; `I want to know who is winning the game!`; `I know it`s time`
to perceive; become conscious of; know.