duller

ADJECTIVE

unintelligent

Synonyms

STRONGEST

boring dim dumb simple slow sluggish stupid tedious

STRONG

addled low shallow

WEAK

backward besotted brainless daffy daft dense dim-witted doltish feeble-minded half-baked ignorant imbecilic indolent insensate moronic not bright numskulled obtuse scatterbrained simple-minded stolid thick unintellectual vacuous wearisome witless

Antonyms

STRONGEST

active bright cognizant exciting fast intelligent interesting smart

WEAK

clear eventful keen knifelike light lively luminous lustrous pointed quick sensitive serrated sharp vivacious witty

ADJECTIVE

insensitive

Synonyms

STRONGEST

boring flat lifeless listless placid quiet slow sluggish

STRONG

accustomed blank callous depressed empty even slack still

WEAK

apathetic colorless dead heavy impassible inactive indifferent inert insensible jejune languid lumpy monotonous passionless prosaic regular routine spiritless stagnant stolid torpid unexciting unresponsive unsympathetic usual vacuous

Antonyms

STRONGEST

active agitated alert energetic fast lively spirited

STRONG

filled full satisfied

WEAK

bright clear eventful exciting intelligent interesting keen knifelike light luminous lustrous pointed quick sensitive serrated sharp smart vivacious witty

ADJECTIVE

boring, uninteresting

Synonyms

STRONGEST

dismal dreary dry flat humdrum ordinary repetitive stale stupid tame tedious tiresome uninspiring

STRONG

abused driveling plain stock tired

WEAK

archaic arid big yawn blah colorless common commonplace dead familiar hackneyed heavy ho hum hoary insipid jejune longwinded monotonous oft-repeated out-of-date pointless prolix prosaic prosy repetitious routine run-of-the-mill soporific trite unimaginative usual usual thing vapid worn-out

Antonyms

STRONGEST

bright exciting happy interesting light lively pleasant

WEAK

active clear eventful intelligent keen knifelike luminous lustrous pointed quick sensitive serrated sharp smart vivacious witty

ADJECTIVE

not sharp

Synonyms

STRONGEST

flat

STRONG

blunt blunted round square turned

WEAK

edentate edentulate edgeless not keen obtuse pointless toothless unpointed unsharpened

Antonyms

STRONG

dishonest

WEAK

active bright clear eventful exciting intelligent interesting keen knifelike light lively luminous lustrous pointed quick sensitive serrated sharp smart vivacious witty

ADJECTIVE

uneventful

Synonyms

STRONGEST

boring flat lifeless listless placid quiet slow sluggish tight

STRONG

accustomed depressed even slack still yawn

WEAK

apathetic blah dead draggy falling off inactive inert languid monotonous regular routine sitting tight slothful stagnant stolid torpid unexciting unresponsive usual without incident

Antonyms

STRONGEST

active agitated alert energetic fast lively spirited

WEAK

bright clear eventful exciting intelligent interesting keen knifelike light luminous lustrous pointed quick sensitive serrated sharp smart vivacious witty

ADJECTIVE

drab, lackluster in effect on senses

Synonyms

STRONGEST

cloudy cold dark dim dismal flat hazy lifeless muddy muted obscure soft somber subdued

STRONG

black blind dun faded low matte muffled overcast plain sober softened

WEAK

ashen colorless dead dingy dusky feeble grimy indistinct leaden mousy murky opaque shadowy sooty subfusc toned-down unlit

Antonyms

STRONGEST

apparent bright brilliant cheerful clear distinct excited good happy hopeful intelligent light rough smart visible

WEAK

active eventful exciting interesting keen knifelike lively luminous lustrous pointed quick sensitive serrated sharp vivacious witty

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“Dull, Duller, Dulles” was the joke around Washington.

From The Wall Street Journal • Apr. 15, 2026

"One is lying over the other and both pieces of wood have notches cut into them," University of Aberystwyth archaeologist Prof Geoff Duller said.

From BBC • Sep. 20, 2023

Study co-author Geoff Duller, an earth scientist at Aberystwyth University in Wales, says the team tried to date the logs using radioactive carbon isotopes, which can show when trees were felled.

From Scientific American • Sep. 20, 2023

“It’s got a bigger battery. It can take more charge,” Duller says.

From Science Magazine • Sep. 20, 2023

Female — Duller plumage and more rusty, inclining to gray.

From Bird Neighbors by Blanchan, Neltje