Which word best describes a person who tends to assume the worst in situations?

The term that best describes a person who tends to assume the worst in situations is "cynical." A cynical individual typically has a mindset that is skeptical of the intentions and actions of others, often anticipating negative outcomes or believing that people are motivated by self-interest. This perspective leads them to perceive scenarios and events through a lens of doubt and pessimism, expecting the worst possible outcomes rather than considering more positive or hopeful interpretations.

In contrast, the other terms describe different attitudes: being optimistic involves looking at the brighter side of things and expecting favorable results, while sentimental refers to a tendency to express feelings, often related to nostalgia, rather than a negative outlook. Hopeful indicates a belief in positive outcomes and possibilities, which is the opposite of a cynical viewpoint. Thus, "cynical" accurately captures the essence of a person who assumes the worst in situations.