"Dantean" is a word in ENGLISH

After writing the letter Sybil lost almost two days. "Coming to," she stumbled across what she had written just before she had dissociated and wrote to Dr. Wilbur as follows: It's just so hard to have to feel, believe, and admit that I do not have conscious control over my selves. It is so much more threatening to have something out of hand than to believe that at any moment I can stop (I started to say "This foolishness") any time I need to. When I wrote the previous letter, I had made up my mind I would show you how I could be very composed and cool and not need to ask you to listen to me nor to explain anything to me nor need any help. By telling you that all this about the multiple personalities was not really true I could show, or so I thought, that I did not need you. Well, it would be easier if it were put on. But the only ruse of which I'm guilty is to have pretended for so long before coming to you that nothing was wrong. Pretending that the personalities did not exist has now caused me to lose about two days.