. . be seen and not ____!

• Listened in
• "Have you ___?"
• Detected, as a group of animals will be here
• Caught word of
• Picked up aurally
• "... seen and not ___"
• Got word of
• Attended to

WordNet Word definitions in WordNet
v. perceive (sound) via the auditory sense get to know or become aware of, usually accidentally; "I learned that she has two grown-up children"; "I see that you have been promoted" [syn: learn , get word , get wind , pick up , find out , get a line , discover ...