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vires

C2
UK/ˈvʌɪriːz/US/ˈvaɪriːz/

Formal, Technical, Legal, Academic

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Definition

Meaning

A plural noun meaning 'forces' or 'powers', particularly in legal or scientific contexts.

Used to denote the legal capacity or authority to act (ultra vires/beyond powers). Also used in biology to refer to the characteristic powers of a microorganism. Archaic general use for 'strength' or 'energy'.

Linguistics

Semantic Notes

Almost exclusively encountered in fixed Latin phrases or technical jargon. Not used in standalone, modern English sentences to mean 'forces' in a general sense.

Dialectal Variation

British vs American Usage

Differences

No significant difference in meaning or usage. Slightly more frequent in UK legal contexts due to Commonwealth legal traditions.

Connotations

Carries connotations of legal formalism, Latin tradition, and technical precision in both varieties.

Frequency

Extremely low frequency in general usage, but standard in specific professional domains (law, microbiology).

Vocabulary

Collocations

strong
ultra viresintra vires
medium
vires ofvires argument
weak
legal virescorporate vires

Grammar

Valency Patterns

[ultra/intra] + vires + [of + NP]the vires + [of + NP] + [to-inf]

Vocabulary

Synonyms

Strong

legal competencejurisdiction

Neutral

powersauthoritycapacity

Weak

forcesstrengths

Vocabulary

Antonyms

powerlessnessincompetence

Phrases

Idioms & Phrases

  • “ultra vires (beyond one's legal power)”
  • “intra vires (within one's legal power)”

Usage

Context Usage

Business

Used in corporate law: 'The transaction was ruled ultra vires the company's memorandum of association.'

Academic

Used in legal studies and microbiology: 'The court examined the vires of the statutory instrument.' / 'The vires of the virus were studied.'

Everyday

Virtually never used in everyday conversation.

Technical

Core term in administrative law and virology.

Examples

By CEFR Level

B2
  • The lawyer argued that the council's decision was ultra vires.
  • The legal vires of the new agency were clearly defined in the Act.
C1
  • A judicial review was sought on the grounds that the minister's directive was ultra vires the powers granted by Parliament.
  • The case turned on whether the subsidiary had the vires to enter into such a contract.

Learning

Memory Aids

Mnemonic

Think: 'VIRes' sounds like 'VI Rus' – in VIking RUSSia, they checked the legal POWERS (vires) before raiding.

Conceptual Metaphor

LEGAL AUTHORITY IS A CONTAINER (ultra/intra vires = outside/inside the bounds).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Do not confuse with Russian 'вирус' (virus). They are false friends.
  • Do not translate as 'жилы' (veins) or 'силы' in a physical sense. It is abstract legal/scientific power.

Common Mistakes

  • Using it as a singular noun ('a vires').
  • Using it outside of set phrases ('He acted with great vires.').
  • Misspelling as 'virus'.

Practice

Quiz

Fill in the gap
The local authority's by-law was declared as it exceeded the powers granted by the parent statute.
Multiple Choice

In which field would you MOST LIKELY encounter the term 'vires' used correctly?

FAQ

Frequently Asked Questions

It is a Latin term used in untranslated form within specific English contexts, primarily law and science. It is not a native English word for general use.

No. This is an archaic usage. In contemporary English, it only carries meaning within fixed phrases like 'ultra vires' or in technical biological contexts.

The direct legal opposite is 'intra vires', meaning an action taken within one's legal power or authority.

It is pronounced /ˈvaɪriːz/ (VY-reez) in both British and American English, with the first syllable rhyming with 'eye'.