Complete the title of Eugene O'Neill's 1928 play: "___ Interlude".

Which adjective describes a condition that can't be treated by surgery? Which adjective is often given to Bavaria's King Ludwig II? Which adjective is part of the name of Flash Gordon's enemy Ming? Which adjective describes someone who speaks English and two other languages? The 1890s are often nicknamed the "___ Nineties". Which adjective fills the blank? Which adjective describes the Church of England? Which adjective describes the split hoof of a goat, or the devil? Which adjective comes before "as leather" and "as nails" in similes?