1. A method, path, or manner that is not clear, well-known, or easy to understand; an indirect or mysterious route or process
The ancient civilization disappeared in an obscure way that historians still debate.
A civilização antiga desapareceu de uma forma obscura que os historiadores ainda debatem.
2. A route or passage that is dark, hidden, or difficult to see
They found the treasure through an obscure way hidden behind the old paintings.
Eles encontraram o tesouro por um caminho obscuro escondido atrás dos quadros antigos.