1) Benumbed 2) Deprived of color 3) Got less sharp 4) Like overused razors 5) Lost brightness 6) Made dull or blunt 7) Made less sharp 8) Took the edge off 9) Uninterested Found on https://www.crosswordclues.com/clue/dulled
benumbedadjective 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` Found on https://www.encyclo.co.uk/local/20974