However, there are subtle differences in their usage:
* Obscure implies something is hidden, unknown, or difficult to find. It suggests a lack of clarity due to being hidden or veiled.
* Unclear implies something is not easily understood or defined. It suggests a lack of clarity due to being vague or ambiguous.
Here are some examples:
* Obscure: The meaning of the ancient inscription was obscure, even to scholars. (Hidden and difficult to decipher)
* Unclear: The instructions were unclear and I wasn't sure what to do. (Vague and ambiguous)