Forbidden vs It's against the law

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

Forbidden

FormalTop 3,000 (common)

It's against the law

FormalTop 5,000 (fairly common)
Most common: Forbidden
 ForbiddenIt's against the law
Pronunciation🇬🇧 //fəˈbɪd.ən//🇺🇸 //fərˈbɪd.ən//🇬🇧 //ɪts əˈɡeɪnst ðə lɔː//🇺🇸 //ɪts əˈɡeɪnst ðə lɔ//
MeaningNot allowed or banned.It is illegal.
ExampleThe secret room was strictly forbidden to anyone except the owner.Driving without a license is really {{highlight}}against the law{{highlight}}.
RegisterFormalFormal
How commonTop 3,000 (common)Top 5,000 (fairly common)
Collocationsforbidden zone, forbidden love, forbidden activities, forbidden fruit, forbidden cityagainst the rules, against the regulations, against public policy
Antonymsallowed, permitted, legalit's legal, it's allowed
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.Confusing with 'it's legal' meaning allowed., Using with informal language., Misusing in non-legal contexts.
Usage notesUsed to describe something that is legally or socially unacceptable. Avoid using in casual conversations.Use this phrase in legal contexts or when discussing rules. It's formal and not suited for casual conversations.

See it in real clips

Forbidden
It's against the law

Frequently asked questions: Forbidden vs It's against the law

What's the difference between Forbidden and It's against the law?

Forbidden: Not allowed or banned. It's against the law: It is illegal.

Which is more common: Forbidden and It's against the law?

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. It's against the law: Driving without a license is really {{highlight}}against the law{{highlight}}.

Can I use Forbidden and It's against the law interchangeably?

Not always. Forbidden and It's against the law 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.