blunt
worthless
abrupt
absurd
aimless
arid
asinine
barren
blah
blank
bloodless
bluff
blunt-edged
blunt-ended
blunt-pointed
blunted
bluntish
bootless
characterless
cold
colorless
dead
dismal
draggy
drearisome
dreary
dry
dryasdust
dull
dull-edged
dull-pointed
dulled
dullish
dusty
edgeless
effete
elephantine
empty
etiolated
fade
faired
fatuous
feckless
flat
fruitless
futile
heavy
ho-hum
hollow
impotent
Embarrass
frivolous
frustrate
inane
inconsequential
ineffective
irrelevant
meaningless
purposeless
tiresome
trivial
unintelligible
uninteresting
unnecessary
unprofitable
useless