dulled

adjective

1
deprived of color
colors dulled by too much sun
greyed with the dust of the road
2
made dull or blunt
3
having lost or been caused to lose interest because of overexposure
the mind of the audience is becoming dulled
the benumbed intellectual faculties can no longer respond

Also useful for “dulled”:Unscrambler— Rearrange the letters in “dulled”