dull?er , dull?est

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"

made dull or blunt[syn: blunted ]

deprived of color; "colors dulled by too much sun"; "greyed with the dust of the road"

noun

exhausted , jaded , sated , worn-out