'Appearance' in the Bible

“The spirit stood still, but I could not discern its appearance;A form was before my eyes;There was silence, and then I heard a voice, saying:

“You prevail forever against him and overpower him, and he passes on;You change his appearance and send him away [from the presence of the living].

“Will you have faith and depend on him to return your grainAnd gather it from your threshing floor?