unauthorized

unauthorized — adjective

1. not having official permission from a person or organization with the right to a

1.形容詞B2
釋義

not having official permission from a person or organization with the right to allow it

例句

Mayumi made an unauthorized entry into the office building after hours.

collocation: unauthorized entry

The company policy states that employees must not install unauthorized software on work computers.

collocation: unauthorized software — company rules context

同義詞
  • unapproved

    more specific — suggests a request was reviewed and rejected, while unauthorized means permission was never sought

  • illegal

    stronger — implies a law has been broken, not just a rule or policy

  • unlicensed

    narrower — specifically about lacking a license or certificate

反義詞
  • authorized

    the direct opposite — having official permission

  • permitted

    milder — allowed, though not necessarily through a formal process

文法句型

unauthorized + noun

be + unauthorized

用法筆記

Commonly used before a noun (attributive) in legal, security, and financial contexts. Can also follow a linking verb: 'This transaction was unauthorized.'

常見錯誤

❌He did an unauthorized thing.
✅He made an unauthorized change to the contract.
💡'unauthorized' is typically paired with a specific noun (access, use, entry, transaction), not a general word like 'thing'.