The word "most staggered" represents a state of being surprised, shocked or bewildered. The antonyms for this word are confident, composed, assured, and certain. If someone is confident, they are sure of their abilities or the outcome of a situation. Composed means to be calm and collected, while assured signifies a belief or confidence in something. Finally, certainty is a state of being completely sure about something. These antonyms for "most staggered" describe a person who is in control and not affected by situations that may be surprising or bewildering to others.