brittle

American  

[brit-l] / ˈbrɪt l /

adjective

brittler, brittlest

1. having hardness and rigidity but little tensile strength; breaking readily with a comparatively smooth fracture, as glass.

   Synonyms:

   fragile

2. easily damaged or destroyed; fragile; frail.

   a brittle marriage.

3. lacking warmth, sensitivity, or compassion; aloof; self-centered.

   a self-possessed, cool, and rather brittle person.

4. having a sharp, tense quality.

   a brittle tone of voice.

5. unstable or impermanent; evanescent.

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noun

1. a confection of melted sugar, usually with nuts, brittle when cooled.

   peanut brittle.

verb (used without object)

brittled, brittling

1. to be or become brittle; crumble.

brittle British  

/ ˈbrɪtəl /

adjective

1. easily cracked, snapped, or broken; fragile

2. curt or irritable

   a brittle reply

3. hard or sharp in quality

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noun

1. a crunchy sweet made with treacle and nuts

   peanut brittle

brittle Scientific  

/ brĭt′l /

1. Having a tendency to break when subject to high stress. Brittle materials have undergone very little strain when they reach their elastic limit, and tend to break at that limit.

2. Compare ductile

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Related Words

See frail ¹.

Other Word Forms

• brittlely adverb
• brittleness noun
• unbrittle adjective
• unbrittleness noun

Etymology

Origin of brittle

First recorded in 1350–1400; Middle English britel, equivalent to brit- (akin to Old English brysten “fragment”) + -el adjective suffix

Explanation

Something brittle is easily broken. Do you have brittle bones? Then no football or rugby for you. Besides meaning easily fractured and emotionally cold, brittle is also a type of candy made of cooled sugar. To make peanut brittle, bake the ingredients on a cookie sheet then let the brittle cool into sheets which you break into pieces (and then eat — wreaking havoc with your braces). It's ok to use the adjective brittle freely to describe lots of things that will break easily — such as a heart, a theory, or a poorly equipped army.

Example Sentences

When stretched, solids elongate until they reach a critical stress point, then break suddenly in a process known as brittle fracture.

From Science Daily • Mar. 30, 2026

The old revolutionary story has grown brittle, feeble.

From The Wall Street Journal • Mar. 26, 2026

Investor sentiment in the software sector remains brittle due to AI fears, with Anthropic set to demonstrate Claude’s capabilities.

From Barron's • Feb. 24, 2026

We move in a familiar loop: outrage at dysfunction, ritualized critique, then a quiet hope that the same brittle systems will somehow stabilize themselves when the stakes get high.

From Salon • Jan. 24, 2026

His frame had withered, wrinkled skin hung off his face, his hair stuck out in brittle clumps, and he'd lost his top front teeth.

From "City of the Plague God" by Sarwat Chadda