B2 adjective Neutral

fiber

/ˈfaɪbər/

A thread-like structure or substance found in plants, animals, or minerals, used to make textiles or supporting biological tissue. In nutrition, it refers to the indigestible part of plant foods that is essential for healthy digestion and preventing disease.

Examples

3 of 5
1

I try to eat a lot of fruit and vegetables to make sure I get enough dietary fiber.

I try to eat a lot of fruit and vegetables to make sure I get enough dietary fiber.

2

The architectural integrity of the structure depends on the high-tensile carbon fiber reinforcements.

The architectural integrity of the structure depends on the high-tensile carbon fiber reinforcements.

3

This old sweater is leaving little bits of fiber all over my shirt.

This old sweater is leaving little bits of fiber all over my shirt.

Word Family

Noun
fiber
Verb
fibrillate
Adverb
null
Adjective
fibrous
Related
fibrillation
💡

Memory Tip

Think of a 'fine fiber'—both words start with 'fi' and fibers are often very fine, thin threads.

Quick Quiz

Doctors recommend a diet high in ___ to improve digestive health.

Correct!

The correct answer is: fiber

Examples

1

I try to eat a lot of fruit and vegetables to make sure I get enough dietary fiber.

everyday

I try to eat a lot of fruit and vegetables to make sure I get enough dietary fiber.

2

The architectural integrity of the structure depends on the high-tensile carbon fiber reinforcements.

formal

The architectural integrity of the structure depends on the high-tensile carbon fiber reinforcements.

3

This old sweater is leaving little bits of fiber all over my shirt.

informal

This old sweater is leaving little bits of fiber all over my shirt.

4

Researchers found that a high-fiber intake is inversely correlated with the risk of cardiovascular disease.

academic

Researchers found that a high-fiber intake is inversely correlated with the risk of cardiovascular disease.

5

We are upgrading the entire office building with fiber-optic cables for faster internet speeds.

business

We are upgrading the entire office building with fiber-optic cables for faster internet speeds.

Word Family

Noun
fiber
Verb
fibrillate
Adverb
null
Adjective
fibrous
Related
fibrillation

Common Collocations

dietary fiber dietary fiber
fiber optics fiber optics
muscle fiber muscle fiber
synthetic fiber synthetic fiber
moral fiber moral fiber

Common Phrases

moral fiber

strength of character

fiber-rich

containing a lot of fiber

optical fiber

a thin glass thread used for transmitting light

Often Confused With

fiber vs fibre

This is simply the British English spelling of the same word.

fiber vs fabric

Fabric is the finished cloth, whereas fiber is the individual thread that makes it up.

📝

Usage Notes

Use 'fiber' when discussing nutrition (roughage) or technology (fiber optics). Note that in US English it is 'fiber', while in UK English it is 'fibre'.

⚠️

Common Mistakes

Learners often treat 'fiber' as a countable noun when referring to nutrition; however, in a dietary context, it is usually uncountable.

💡

Memory Tip

Think of a 'fine fiber'—both words start with 'fi' and fibers are often very fine, thin threads.

📖

Word Origin

Derived from the Latin 'fibra', meaning a leaf, filament, or entrail.

Grammar Patterns

Uncountable when referring to food substance Countable when referring to individual strands Often used as a noun-modifier (e.g., fiber content)
🌍

Cultural Context

In Western health culture, 'high-fiber' diets are heavily promoted for longevity and gut health.

Quick Quiz

Doctors recommend a diet high in ___ to improve digestive health.

Correct!

The correct answer is: fiber

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