Fatuous (5)
I believe the answer is:
inane
(Other definitions for inane that I've seen before include "Mindlessly silly" , "Really stupid" , "Silly, fatuous" , "Stupid and silly" , "Puerile" .)
I believe the answer is:
inane
(Other definitions for inane that I've seen before include "Mindlessly silly" , "Really stupid" , "Silly, fatuous" , "Stupid and silly" , "Puerile" .)