慯狠深慯狠深

The phrase '慯狠深' translates literally to something without clear meaning because these characters when put together aren't a proper idiom or saying. But as a single unique pen-name, it can denote someone who feels profoundly and intensely. '狠' indicates intensity or firmness, so perhaps this username signifies deep-seated strength or emotions that lie within an individual who chooses such a dramatic and somewhat melancholic-sounding title.