obscured
adj.hidden from view or difficult to see and understand. You use this when something like clouds, smoke, or a lack of information makes it hard to see the truth.
adj.rendered unclear, hidden, or difficult to perceive. Often functions as a participial adjective following a linking verb or preceding a noun to describe a lack of clarity.
“The mountain peak was obscured by thick clouds.”
“The true meaning of the contract was obscured by complex legal language that even the lawyers struggled to explain.”
“The historical facts of the event have been obscured by decades of conflicting propaganda, making it nearly impossible for modern researchers to reconstruct the original timeline with any certainty.”
Commonly used with the preposition 'by' to indicate the cause of the lack of clarity.