Is 'fibre' countable or uncountable?

It is usually uncountable when referring to the general substance (dietary fibre, moral fibre). It becomes countable when referring to individual strands or types (synthetic fibres, a fibre of wool).

What's the main difference between British and American English for this word?

The spelling: UK 'fibre', US 'fiber'. The pronunciation is also slightly different, with the US version having a rhotic 'r' sound (/bɚ/).

Can 'fibre' mean 'internet connection'?

Yes, colloquially. 'Fibre broadband' or 'fibre internet' refers to a connection delivered via fibre-optic cables, known for high speed.

What is 'moral fibre'?

It is an idiom meaning strength of character, integrity, and the ability to persevere through difficulty. It treats moral strength as a tangible, thread-like substance forming one's being.

fibre

UK/ˈfaɪ.bər/US/ˈfaɪ.bɚ/

formal (esp. BrE spelling), technical, everyday (in nutrition), literary (moral sense)

My Flashcards

Definition

Meaning

A thin, thread-like structure, either natural (from plants, animals) or artificial, forming part of a material's composition or serving as a basic structural unit.

1) Dietary material from plants that is indigestible and aids digestion. 2) Moral strength or character. 3) The essential structure or character of something. 4) Material used for telecommunications (fibre optics).

Linguistics

Semantic Notes

Primarily a noun; verb form 'fibre' is non-standard (see 'fiberise/fiberize'). The spelling 'fibre' strongly signals British English contexts.

Dialectal Variation

British vs American Usage

Differences

Spelling: UK 'fibre', US 'fiber'. In US, 'fiber' is overwhelmingly standard in all contexts. In UK, 'fibre' is standard.

Connotations

Identical connotations regarding material, nutrition, and character. The UK spelling is often retained in scientific/technical brand names even in the US.

Frequency

The UK spelling 'fibre' is relatively rare in US-published texts except in specific brand names or historical quotes.

Vocabulary

Collocations

strong

dietary fibrehigh-fibremuscle fibrenerve fibremoral fibrecarbon fibreoptical fibre

medium

natural fibresynthetic fibrefibre contentfibre opticsglass fibrecotton fibre

weak

rich in fibrelack of fibrepiece of fibrebundle of fibresfibre intake

Grammar

Valency Patterns

[Adj] + fibrefibre + of + [Noun]fibre + in + [Noun]

Vocabulary

Synonyms

Strong

filament (technical)strand (for materials)roughage (for dietary)

Neutral

threadstrandfilamenttextile

Weak

texturesubstancematerial

Vocabulary

Antonyms

refinement (moral sense)processed food (dietary sense)weakness

Phrases

Idioms & Phrases

“To be made of sterner stuff (related to 'moral fibre')”

Usage

Context Usage

Business

Refers to materials (e.g., 'carbon fibre components'), telecommunications ('fibre broadband'), or product labelling ('high-fibre cereal').

Academic

Used in biology ('nerve fibre'), materials science ('polymer fibres'), nutrition science ('soluble fibre'), and textiles.

Everyday

Most common in discussions of diet ('You need more fibre') and materials ('This jumper is made from natural fibres').

Technical

Precise use in optics ('fibre-optic cable'), engineering ('fibre-reinforced plastic'), and anatomy ('muscle fibre').

Examples

By Part of Speech

verb

British English

'Fibre' is not standard as a verb. Use 'to fibreise' or 'to add fibre to'.

American English

'Fiber' is not standard as a verb. Use 'to fiberize'.

adjective

British English

A high-fibre diet is recommended.
Fibre-optic technology has revolutionised communications.

American English

A high-fiber diet is recommended.
Fiber-optic technology has revolutionized communications.

Examples

By CEFR Level

Eat fruit and vegetables for fibre.
My scarf is made from soft fibres.

Wholemeal bread contains more dietary fibre than white bread.
The rope was made from strong synthetic fibres.

Scientists are developing new carbon fibre materials for the automotive industry.
His moral fibre was tested during the difficult negotiations.

The proliferation of fibre-optic networks has enabled unprecedented data transmission speeds.
The very fibre of the nation's democracy seemed to be unravelling.

Learning

Memory Aids

Mnemonic

Imagine a FIBRE is a FINE BRANCH from a tree – thin, thread-like, and part of a larger structure, whether in wood, food, or character.

Conceptual Metaphor

STRENGTH IS FIBRE ('moral fibre'), STRUCTURE IS A WEB OF THREADS ('the fibre of society'), HEALTH/REGULARITY IS DIETARY FIBRE.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Do not confuse with 'фибра' (fibreboard/paper pulp) which is a specific material. 'Fibre' as a concept is 'волокно'. 'Dietary fibre' is 'пищевые волокна' or 'клетчатка'. 'Moral fibre' has no direct equivalent; use 'сила характера' or 'стойкость'.

Common Mistakes

*'This food contains many fibres.' (Incorrect for dietary sense; use uncountable 'fibre').
Using US spelling 'fiber' in a UK English context.
Confusing 'fibre' (BrE) with 'fiber' (AmE) as different words.

Practice

Quiz

Fill in the gap

To improve your digestion, you should increase your intake of dietary .

Multiple Choice

In which context is 'fibre' used metaphorically?

FAQ

Frequently Asked Questions

: It is usually uncountable when referring to the general substance (dietary fibre, moral fibre). It becomes countable when referring to individual strands or types (synthetic fibres, a fibre of wool).
: The spelling: UK 'fibre', US 'fiber'. The pronunciation is also slightly different, with the US version having a rhotic 'r' sound (/bɚ/).
: Yes, colloquially. 'Fibre broadband' or 'fibre internet' refers to a connection delivered via fibre-optic cables, known for high speed.
: It is an idiom meaning strength of character, integrity, and the ability to persevere through difficulty. It treats moral strength as a tangible, thread-like substance forming one's being.