opaque

Adjective B2 – Upper-Intermediate

Not letting light through, or, when used figuratively, very difficult to understand or see through.

"The negotiations were so opaque that even senior staff had no idea what had been agreed."

'Opaque' is used both literally, for materials that block light, and figuratively, for situations or writing that are hard to understand.

Synonyms

murky impenetrable

transparent clear