· make dull in appearance; "Age had dulled the surface"

Hypernym(s): change, alter, modify

· become dull or lusterless in appearance; lose shine or brightness; "the varnished table top dulled with time"

Hypernym(s): change

· deaden (a sound or noise), especially by wrapping

Synonym(s): muffle, mute, damp, dampen, tone_down

Hypernym(s): soften

· make numb or insensitive; "The shock numbed her senses"

Synonym(s): numb, benumb, blunt

Hypernym(s): desensitize, desensitise

· make dull or blunt; "Too much cutting dulls the knife's edge"

Synonym(s): blunt

Hypernym(s): change, alter, modify

Antonym(s): sharpen

· become less interesting or attractive

Synonym(s): pall

Hypernym(s): change

· make less lively or vigorous; "Middle age dulled her appetite for travel"

Hypernym(s): weaken

· lacking in liveliness or animation; "he was so dull at parties"; "a dull political campaign"; "a large dull impassive man"; "dull days with nothing to do"; "how dull and dreary the world is"; "fell back into one of her dull moods"

Antonym(s): lively

· emitting or reflecting very little light; "a dull glow"; "dull silver badly in need of a polish"; "a dull sky"

Antonym(s): bright

· being or made softer or less loud or clear; "the dull boom of distant breaking waves"; "muffled drums"; "the muffled noises of the street"; "muted trumpets"

Synonym(s): muffled, muted, softened

· so lacking in interest as to cause mental weariness; "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldn't capture their attention"; "what an irksome task the writing of long letters is"- Edmund Burke; "tedious days on the train"; "the tiresome chirping of a cricket"- Mark Twain; "other people's dreams are dreadfully wearisome"

Synonym(s): boring, deadening, ho-hum, irksome, slow, tedious, tiresome, wearisome

· (of color) very low in saturation; highly diluted; "dull greens and blues"

· not keenly felt; "a dull throbbing"; "dull pain"

Antonym(s): sharp

· slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"

Synonym(s): dense, dim, dumb, obtuse, slow

· (of business) not active or brisk; "business is dull (or slow)"; "a sluggish market"

Synonym(s): slow, sluggish

· not having a sharp edge or point; "the knife was too dull to be of any use"

Antonym(s): sharp

· blunted in responsiveness or sensibility; "a dull gaze"; "so exhausted she was dull to what went on about her"- Willa Cather

· not clear and resonant; sounding as if striking with or against something relatively soft; "the dull thud"; "thudding bullets"

Synonym(s): thudding

· darkened with overcast; "a dark day"; "a dull sky"; "the sky was leaden and thick"

Synonym(s): leaden