When people say “they're engaged,” the phrase “to be married” 'is understood'. [=“they're engaged” is understood to mean “they're engaged to be married”]
We still don't fully 'understand' the causes of the disease. = The causes of the disease are still not fully 'understood'.
He believed it 'was understood' [=believed that everyone had agreed] that he would be paid for the work.
(..) Dialogue: ..,Default,,,work in your office Dialogue: ..,Default,,,defending clients. Dialogue: ..,Default,,,It wasn't right,\Nbut I understood. Dialogue: ..,Default,,,If she lost a case,\Na family got broken up Dialogue: ..,Default,,,or a child's hopes\Nfor the future destroyed. (..)2016 TvShow: Bones Title: The Death in the Defense Season: 11 Episode 11