1. muddy, foul, thick, troubled , Lat. turbidus, properly of water, (Herdotus Historicus), etc.

2. metaphorically troubled by passion or madness , θολεροὶ λόγοι (Aeschulus Tragicus); θολερῷ χειμῶνι with turbid storm of madness, (Sophocles Tragicus) (ML)