dull
verb
make dull in appearance
“Age had dulled the surface”
become dull or lusterless in appearance; lose shine or brightness
“the varnished table top dulled with time”
deaden (a sound or noise), especially by wrapping
make numb or insensitive
“The shock numbed her senses”
make dull or blunt
“Too much cutting dulls the knife's edge”
SynonymsbluntOppositessharpenbecome less interesting or attractive
Synonymspallmake less lively or vigorous
“Middle age dulled her appetite for travel”
adjective
lacking in liveliness or animation
“he was so dull at parties”
“a dull political campaign”
Oppositeslivelyemitting or reflecting very little light
“a dull glow”
“dull silver badly in need of a polish”
Oppositesbrightbeing or made softer or less loud or clear
“the dull boom of distant breaking waves”
“muffled drums”
so lacking in interest as to cause mental weariness
“a boring evening with uninteresting people”
“the deadening effect of some routine tasks”
(of color) very low in saturation; highly diluted
“dull greens and blues”
not keenly felt
“a dull throbbing”
“dull pain”
Oppositessharpslow to learn or understand; lacking intellectual acuity
“so dense he never understands anything I say to him”
“never met anyone quite so dim”
(of business) not active or brisk
“business is dull (or slow)”
“a sluggish market”
not having a sharp edge or point
“the knife was too dull to be of any use”
Oppositessharpblunted in responsiveness or sensibility
“a dull gaze”
“so exhausted she was dull to what went on about her”
not clear and resonant; sounding as if striking with or against something relatively soft
“the dull thud”
“thudding bullets”
Synonymsthuddingdarkened with overcast
“a dark day”
“a dull sky”
Synonymsleaden
Source: WordNet 3.1, Princeton University
