Those photos are so horrific that you can't bear to look at them.
Tips
usage
Comes before a verb: 不忍离开 "can't bear to leave", 不忍直视 "can't bear to look", which online also jokes that something is too awful or embarrassing to watch. In speech people more often say 不忍心.
grammar
Read as plain 不 + 忍, it means "not put up with it": 我不忍了 "I'm not taking it any more".
