Forbidden vs Without authorization

When to use each in English, with meaning, register, and examples.

Forbidden

FormalTop 3,000 (common)

Without authorization

FormalBeyond 10,000 (less common)
Most common: Forbidden
 ForbiddenWithout authorization
Pronunciation🇬🇧 //fəˈbɪd.ən//🇺🇸 //fərˈbɪd.ən//🇬🇧 //wɪθˈaʊt ɔːθəraɪˈzeɪʃən//🇺🇸 //wɪθˈaʊt ɔˈθɪrəˌzeɪʃən//
MeaningNot allowed or banned.Not having permission to do something.
ExampleThe secret room was strictly forbidden to anyone except the owner.The employee accessed the files without authorization.
RegisterFormalFormal
How commonTop 3,000 (common)Beyond 10,000 (less common)
Collocationsforbidden zone, forbidden love, forbidden activities, forbidden fruit, forbidden cityaccess without authorization, act without authorization, enter without authorization
Antonymsallowed, permitted, legal-
Common mistakesConfused with 'prohibited' - both mean similar things, but 'forbidden' is less formal., Incorrectly used as a verb - 'forbidden' is strictly an adjective., Using 'forbidden' in positive contexts - it always suggests something disallowed.Confused with 'unauthorized' which is a single word., Incorrectly using 'with authorization' when intending to say 'without authorization'.
Usage notesUsed to describe something that is legally or socially unacceptable. Avoid using in casual conversations.Use 'without authorization' in formal contexts like legal or official communications. Avoid in casual conversations.

See it in real clips

Forbidden
Without authorization

Frequently asked questions: Forbidden vs Without authorization

What's the difference between Forbidden and Without authorization?

Forbidden: Not allowed or banned. Without authorization: Not having permission to do something.

Which is more common: Forbidden and Without authorization?

Forbidden is the most common in everyday English.

Can you show an example of each?

Forbidden: The secret room was strictly forbidden to anyone except the owner. Without authorization: The employee accessed the files without authorization.

Can I use Forbidden and Without authorization interchangeably?

Not always. Forbidden and Without authorization are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.