Boredom, tedium (5)
I believe the answer is:
ennui
I believe this is a double definition.
'boredom' is the first definition.
(I know that boredom can be written as ennui)
'tedium' is the second definition.
(I know that tedium can be written as ennui)
(Other definitions for ennui that I've seen before include "Weary feeling" , "Sense of tedium" , "Lack of interest" , "to make one list less when connected" , "Lower interest rate" .)