To be uncertain about something can be described as?

To be uncertain about something means to lack clarity or confidence regarding that thing. The word "obscure" captures this sense of uncertainty effectively, as it refers to something that is not clear or easily understood. When a situation or piece of information is described as obscure, it suggests that it is hidden from view or that understanding it requires additional effort, which aligns with the notion of uncertainty.

In contrast, the other choices directly oppose the idea of uncertainty. "Clear" signifies a strong understanding or visibility, "visible" pertains to being seen without ambiguity, and "accurate" conveys precision and correctness. None of these options relates to the hesitance or lack of surety implied by being uncertain, making "obscure" the most fitting descriptor for that state of mind.