Which word indicates a state full of anxiety and concern?

The word "solicitous" perfectly captures a state of anxiety and concern, particularly in the context of showing care or worry for someone's well-being. It suggests an attentiveness to others' needs and often implies that there is an underlying concern that prompts such attentiveness. For instance, a solicitous person might go out of their way to ensure that someone is comfortable or safe, reflecting a deep-seated worry about that person's situation.

In contrast, the other words do not convey the same emotional connotation. "Aggrandize" refers to the act of increasing or enhancing one's power or status, which is unrelated to feelings of anxiety. "Probity" denotes integrity and adherence to moral principles, focusing on honesty rather than concern. "Pulchritude" refers to physical beauty, which also lacks any implication of anxiety or concern. Therefore, "solicitous" stands out as the most appropriate choice to indicate a state filled with anxiety and concern.