I was filled with a wordless obscurely murderous unrest. which word provides the best context clue to meaning of obscurely?

The word that provides the best context clue to the meaning of "obscurely" is "wordless".

Here's why:

* "Wordless" implies that the murderous unrest is difficult to express or articulate. It suggests a feeling that is deep-seated and difficult to put into words.

* "Obscurely" then reinforces this idea. It means "in a way that is not clear or easily understood," further emphasizing the difficulty in expressing the feeling.

Therefore, the combination of "wordless" and "obscurely" suggests a murderous unrest that is both intense and hard to define.