Which word signifies an uncaring attitude towards responsibilities?

The word that signifies an uncaring attitude towards responsibilities is "remiss." This term is derived from the Latin word "remittere," which means to send back or to neglect. When someone is described as remiss, it indicates that they are neglectful in the performance of their duties or responsibilities, often showing a lack of concern or care. This captures the essence of an uncaring attitude, particularly in contexts where someone has obligations that they are failing to fulfill.

The other terms do not convey the same meaning. "Unfeigned" refers to sincerity and genuineness, indicating a lack of deception or pretense. "Plod" describes the act of moving heavily or laboriously, often used in the context of work that is tedious rather than neglectful. "Virulent" usually relates to something that is highly infectious or poisonous, often applied to diseases or harmful substances, and does not pertain to personal responsibility or carelessness. Thus, "remiss" is the term that most accurately embodies an uncaring approach to responsibilities.