The term SIGN TO HEED is composed of two words, PORTENT (7 letters) and OMEN (4 letters). A PORTENT is a sign or warning that something important or significant is about to happen. An OMEN is a sign or warning of what will happen in the future, especially as an influence on a person's behaviour. Together, these two words indicate that one should pay attention to signs and warnings in order to anticipate and prepare for what is to come.