1 caustic | Definition of caustic

caustic

adjective
caus·​tic | \ ˈkȯ-stik How to pronounce caustic (audio) \

Definition of caustic

 (Entry 1 of 2)

1 : capable of destroying or eating away by chemical action : corrosive The chemical was so caustic that it ate through the pipe.
2 : marked by incisive sarcasm a caustic film review caustic humor
3 : relating to or being the surface or curve of a caustic (see caustic entry 2 sense 2)

caustic

noun

Definition of caustic (Entry 2 of 2)

1 : a caustic agent: such as
a : a substance that burns or destroys organic tissue by chemical action
b : a strong corrosive alkali (such as sodium hydroxide)
2 : the envelope of rays emanating from a point and reflected or refracted by a curved surface

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Other Words from caustic

Adjective

caustically \ ˈkȯ-​sti-​k(É™-​)lÄ“ How to pronounce caustically (audio) \ adverb
causticity \ kȯ-​ˈsti-​sÉ™-​tÄ“ How to pronounce causticity (audio) \ noun

Choose the Right Synonym for caustic

Adjective

caustic, mordant, acrid, scathing mean stingingly incisive. caustic suggests a biting wit. caustic comments mordant suggests a wit that is used with deadly effectiveness. mordant reviews of the play acrid implies bitterness and often malevolence. acrid invective scathing implies indignant attacks delivered with fierce severity. a scathing satire

Did You Know?

Adjective

If you have a burning desire to know the origins of "caustic," you're already well on the way to figuring it out. "Caustic" was borrowed into English in the 14th century from the Latin causticus, which itself derives from the Greek kaustikos. "Kaustikos," in turn, comes from the Greek verb kaiein, meaning "to burn." Other "kaiein" descendants in English include "cautery" and "cauterize," "hypocaust" (an ancient Roman heating system), "causalgia" (a burning pain caused by nerve damage), and "encaustic" (a kind of paint which is heated after it's applied).

Examples of caustic in a Sentence

Adjective

His [Roosevelt's] caustic cousin, Alice Roosevelt Longworth, called him a sissy and a mama's boy. — Garry Wills, Atlantic, April 1994 It was Schuyler's gift for satire and his caustic wit that distinguished his writings and led to his nickname, the Black Mencken. — Henry Louis Gates, Jr., New York Times Book Review, 20 Sept. 1992 Albert quailed before those caustic pronouncements, he shuddered and blanched and felt his stomach drop like a croquette into a vat of hot grease. — T. Coraghessan Boyle, Harper's, October 1987 The chemical was so caustic that it ate through the pipes. She wrote a caustic report about the decisions that led to the crisis.
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Recent Examples on the Web: Adjective

Growers leave behind tons of garbage, such as car batteries, propane tanks and food along with other caustic pesticides, herbicides and rodent killers. Los Angeles Times, "Illegal cannabis farms still scarring public lands, two years after Prop. 64," 29 Aug. 2019 The man was convicted of hitting his girlfriend with a pipe and hammer, pouring a caustic substance on her and setting her on fire, court records show. Jeremy Gorner, chicagotribune.com, "A disturbing video. A mysterious blue container. An AWOL parolee with a violent history. Chilling details surround the case of a missing Chicago woman," 29 Aug. 2019 Known as a caustic renegade, Davis was one of the first outspoken owners in sports. The Si Staff, SI.com, "100 Figures Who Shaped the NFL’s First Century," 28 Aug. 2019 Doctors say the illnesses resemble an inhalation injury, with the lungs apparently reacting to a caustic substance. Washington Post, "The Latest: CDC: Nearly 200 in 22 states sick after vaping," 25 Aug. 2019 Always start with the simplest, least caustic method. Joseph Truini, Popular Mechanics, "How To Get Leaf Stains Off Your Wood Deck," 24 Aug. 2019 Doctors say the illnesses resemble an inhalation injury, with the lungs apparently reacting to a caustic substance. Mike Stobbe, Anchorage Daily News, "Reported illness among vapers reaches 150 possible cases," 22 Aug. 2019 Moritz, a former journalist, has a sometimes caustic tongue. Owen Thomas, SFChronicle.com, "Can Silicon Valley break the IPO?," 21 Aug. 2019 Jonathan Parker plays Tom, with Rolando Cantu Jr. as his caustic co-worker, Carter, and Amanda Rawlings as Jeannie. Don Maines Staff Writer, Houston Chronicle, "Biting Pasadena comedy explores how society views plus-sized people," 16 Aug. 2019

Recent Examples on the Web: Noun

What McHugh favored was the fantastic, the caustic, the nakedly human, art with an irreverent or whimsical sense of humor, and art with little remove from raw physicality. Leah Ollman, latimes.com, "This Candy Store wasn't a candy store: Remembering a California gallery that made art stars," 3 July 2018 The Sympathizer is the caustic, hyper-verbal tale of a double agent embedded in California after the end of the war, sending information back to Vietnam about the activities of the men who are both his friends and enemies. Josephine Livingstone, New Republic, "Viet Thanh Nguyen’s Ghosts," 25 July 2017 Mr. Trump’s other mentor was the caustic and conniving McCarthy-era lawyer Roy Cohn, who counseled Mr. Trump never to give in or concede error. Glenn Thrush And Maggie Haberman, New York Times, "Why Letting Go, for Trump, Is No Small or Simple Task," 21 Mar. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'caustic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of caustic

Adjective

14th century, in the meaning defined at sense 1

Noun

15th century, in the meaning defined at sense 1

History and Etymology for caustic

Adjective and Noun

Latin causticus, from Greek kaustikos, from kaiein to burn

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