GIVE HEED TO is an expression used to encourage someone to pay attention to something, usually a warning or advice. The term can be broken down into three crossword solutions: NOTE (4 letters), OBEY (4 letters), and HARKEN (6 letters). NOTE means to take notice of something, OBEY implies following instructions, and HARKEN means to listen attentively. Together, these words suggest that one should pay close attention to what is being said and follow the instructions given.