Crossword Genius

Was certain about (4)

Ross

I believe the answer is:

knew

(Other definitions for knew that I've seen before include "Was conscious of" , "Recognised" , "Was aware of the fact" , "Was familiar with" , "Was cognizant of" .)

I've seen this clue in the Newsday and the USA Today.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.