puzzling
adj. B2 Upper Intermediate US //ˈpəzəɫɪŋ// UK //pˈʌzlɪŋ// puz·zling
adj. confusing and difficult to understand. You use this to describe something that feels like a mystery or a problem you cannot solve.
adj. causing confusion or perplexity due to being difficult to explain or understand. Often used to describe situations, behaviors, or evidence that lack a clear logical pattern.
The detective found a puzzling clue at the scene.
The sudden change in the weather was puzzling to the scientists who had predicted a sunny day.
Despite years of intensive research, the disappearance of the ancient civilization remains a puzzling mystery that continues to divide the archaeological community.
Usage
Typically used attributively before a noun or predicatively after linking verbs like 'be', 'seem', or 'find'.