Which word describes someone who does not have enough money to pay for necessities?

The word that describes someone who does not have enough money to pay for necessities is "impecunious." This term specifically refers to individuals who are lacking in funds or are financially impoverished. It conveys a sense of persistent financial struggle, often highlighting a state of being perpetually without money, especially when it comes to basic needs like food and shelter.

In contrast, the other options do not relate to financial status in this manner. "Imposed" typically refers to something that has been forced upon someone or something that has been established, while "harangue" means to lecture or criticize someone in an aggressive manner. Lastly, "frigid" describes something that is extremely cold or lacking warmth; it does not have any financial connotation. Thus, "impecunious" is the appropriate term for someone unable to afford necessities.