boring, silly, etc. in the extreme
boring in the extreme
Extremely boring. That film was boring in the extreme—it actually put me to sleep in the theater!
silly in the extreme
Extremely silly. I thought that movie was silly in the extreme, but the kids loved it.
boring, silly, etc. in the exˈtremeextremely boring, silly, etc: I must admit, it’s puzzling in the extreme just how these books found their way here.
See also: extreme