The term 'listen carefully' can be expressed in a variety of ways, including the four crossword solutions HEED (4 letters), HEARKEN (7 letters), READMYLIPS (10 letters), and PAYATTENTION (12 letters). HEED is an old-fashioned word meaning to pay attention to something or someone, while HEARKEN is a synonym for listen. READMYLIPS is an idiom that means to pay close attention to what is being said, and PAYATTENTION is a straightforward phrase that conveys the same message. All four solutions suggest that one should take the time to listen carefully to what is being said.