dull   
badrahodra
plump yet awkward, clumsy, clownish, inelegant, dull, heavy looking. [Richardson 1885]
dary
slow, dull of motion. Used only of animals [Richardson 1885]
dombo
blunt, dull on the edge [Hallanger 1973]
mandombo
to blunt, to make dull [Hallanger 1973]
matroka
tarnished, dull colored [Hallanger 1973]