What does "cavalier" suggest about someone's attitude?

The term "cavalier" suggests an attitude that is marked by a carefree or dismissive approach, often coupled with a sense of lordly disdain or a lack of concern for what may be viewed as important by others. This context stems from the historical notion of the "cavalier" as a gentleman, particularly in the sense of the royalists during the English Civil War, who were often considered to be aloof or indifferent to the concerns of the common people. The connotation implies a nonchalance or insouciance, indicating that the individual may disregard the implications of their attitude or actions, projecting a sense of superiority or detachment.

In contrast, the other options describe attitudes that either lack this dismissive quality or suggest a level of seriousness and thoughtfulness that is not aligned with the original meaning of "cavalier." For instance, being serious and thoughtful or methodical and careful would indicate a level of engagement and consideration which is the opposite of being carefree and disdainful. Anxious and worried convey a sense of concern and worry, again diverging from the carefree aspect associated with a cavalier attitude.