Real Dictionary

obscure
adjective: If something or someone is obscure, they are unknown, or are known by only a few people.
adjective: Something that is obscure is difficult to understand or deal with, usually because it involves so many parts or details.
verb: If one thing obscures another, it prevents it from being seen or heard properly.
verb: To obscure something means to make it difficult to understand.

obscure in American English
lacking light; dim; dark; murky
adjective: not clear or plain; ambiguous, vague, or uncertain
noun: obscurity
transitive verb: to conceal or conceal by confusing (the meaning of a statement, poem, etc.)

obscure in British English
to make unclear, vague, or hidden
adjective: unclear or abstruse
noun