Dull

blöd

(not bright or intelligent)

blöde

(not bright or intelligent)

dumm

(not bright or intelligent)

dumpf

(not bright or intelligent)

fad

(boring, not exciting or interesting — see also boring)

langweilig

(boring, not exciting or interesting — see also boring)

matt

(not shiny)

stumpf

(lacking the ability to cut easily; not sharp)

stumpf

(not shiny)

trüb

(cloudy, overcast)

abstumpfen

(to render dull)

abstumpfen

(to soften, moderate or blunt)

abstumpfen

(to become dull)