Vocabulary Spotlight

Caustic

Part of Speech: Adjective

Definition: Capable of burning or corroding; also used to describe sharp, biting, or sarcastic comments.

“Her caustic remarks left everyone in stunned silence.”

Pronunciation

[KAW-stik]

Synonyms, Antonyms & Related Words

Synonyms

Corrosive
Abrasive
Acrid
Biting
Sarcastic

Antonyms

Gentle
Mild
Kind
Soothing
Bland

Related Words

Burn
Acrimony
Harshness

Word Origin

“Caustic” comes from the Greek word kaustikos, meaning “capable of burning,” through Latin, entering English in the 14th century as a description for both chemical properties and sharp comments.

Word Family

Adjective: Caustic – Describing something corrosive or sarcastic.

Noun: Causticity – The quality of being caustic.

Mnemonics

Think “Caustic chemicals cause burns,” helping to remember both corrosive chemicals and burning comments.

Industry-specific Usage

Chemistry

In chemistry, caustic substances like lye or bleach have corrosive properties, often used in industrial applications.

Medicine

In medicine, caustic chemicals can burn or corrode tissue, requiring careful handling.

Social Commentary

In social commentary, caustic remarks describe sharp, often sarcastic or biting criticism.

In Context

“Caustic” is used to describe substances that can cause burns and also to depict biting or harsh remarks. In both cases, it implies a potent, sometimes harmful effect, whether on material surfaces or emotional interactions.

Vocabulary Challenges

1. Which word is closest in meaning to “Caustic”?

Gentle
Abrasive
Kind
Soothing

‘Abrasive’ is correct as it conveys the harsh, biting nature of something caustic.

2. Fill in the blank: The politician’s _______ response left the interviewer speechless.

caustic
gentle
soothing
kind

‘Caustic’ is correct, as it describes the sharp, sarcastic nature of the response.

3. Which scenario would likely involve something caustic?

Gently washing with water
Applying soothing lotion
Using bleach to clean surfaces
Speaking kindly to a friend

‘Using bleach to clean surfaces’ is correct, as bleach is a caustic substance that can corrode or burn.