caustic

Sharp and scathing

Caustic describes substances that can burn or corrode organic tissue through chemical action, like lye or strong acids.

The word extends naturally to speech or wit that burns in its own way—sharp, biting, and capable of wounding.

A caustic remark cuts with acidic precision; a caustic sense of humor leaves marks.

The tone suggests not just criticism but a corrosive quality that eats away at its target.

chemical

corrosive

Destroys by chemical action

lyeHydroxide cleaning solution
sodium hydroxideCorrosive alkaline compound
alkaliAcid-neutralizing ionic compound

acid · etching · reactive · oxidizing · bleach · solvent · ammonia · sulfuric · hydrochloric · nitric

critical

scathing

Severely and bitingly critical

bitingHarshly critical or cold
cuttingDividing via sharp edge
acerbicSharp and biting

sardonic · vitriolic · trenchant · mordant · harsh · severe · brutal · devastating · withering · excoriating

personality

abrasive

Rough enough to erode

harshUnpleasantly severe or rough
bitterSharp, unpleasant taste
mean-spiritedUnkind in a petty way

cruel · unkind · hurtful · wounding · offensive · disagreeable · hostile · antagonistic · ill-tempered · sharp

burning

blistering

Extremely intense or severe

scaldingExtremely hot, burning
searingBrowning with intense heat
scorchingExtremely hot, burning

biting · stinging · raw · irritant · erosive · ulcerative · lesion · chemical burn · exposure · hazmat

sarcasm

wit

Clever, inventive humor

ironyMeaning opposite to words
mockeryScornful ridicule or travesty
snarkCutting, mocking commentary

cynicism · satire · ridicule · derision · contempt · scorn · barb · jibe · taunt · sneer

Categories

chemicalschemicals, compounds, acids, reagents, solutions
harsh tonesharsh, sharp, biting, cutting, acerbic
negative tonesangry, bitter, cynical, hostile, resentful
harshbiting, bitter, brutal, cruel, cutting
pH Levelsacidic, alkaline, basic, neutral, low pH
snarksarcasm, snark, jab, barb, dig

Opposites

chemical corrosiveness

causticinert

Inactive, physically or chemically

neutral · noncorrosive · harmless · mild · benign

speech/manner harshness

causticgentle

Soft and kind

kind · soothing · mild · pleasant · gracious

humor style

causticgood-natured

Having a friendly temperament

good-humored · genial · warm-hearted · playful · lighthearted

Phrases

caustic witHarsh, cutting cleverness
caustic sodaSodium hydroxide
caustic humorComedy through corrosion

Family

caustically, causticity, caustics, encaustic, caustic soda

Familiarity: Top 100,000
Profile: Used worldwide · Timeless · Negative · Everyday, not technical · Rated G