boring, dim, dumb, repetitive, dreary, stupid, tiresome, or tedious. Those are all opposites of dull.
dull
An antonym for sparkle is dullness.
The antonym for resonate is "dissociate" or "disconnect."
A dull story
Dull, unimaginative.
dull, inconspicuous, drab,
dull, boring, ordinary, plain tiresome, tedious, boring, dull, mind-numbing.
bright intellligent sharp
Anger, dull or upset.
Flat, dull, insignificant .
Dull, boring.
colorless,colourles,dull