Which term describes someone or something that is untidy and not well maintained?

The term that best describes someone or something that is untidy and not well maintained is "unkempt." This word specifically conveys a sense of disarray or lack of grooming, making it suitable for describing appearances that are messy, neglected, or deliberately unpolished. When applied to a person, it suggests a lack of attention to personal hygiene or attire. In the context of surroundings, it indicates that the space is cluttered or poorly organized.

Other terms provided carry opposite meanings or describe a well-maintained condition. "Kempt" refers to someone who is neatly kept, while "polished" implies a high level of refinement and care. "Orderly" indicates a neat and organized state, contrasting sharply with the idea of being unkempt. Thus, "unkempt" is the term that accurately reflects the desired concept of untidiness and poor maintenance.