unlawful
5 synonyms and 1 antonyms for unlawful, grouped by meaning and by how common each one is.
Adjective — Against the law; not legally permitted.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Antonyms
How to use unlawful
The word patterns that sound natural to a native speaker.
Etymology
From "un-" + "lawful."
Full origin of unlawful →Frequently asked questions
What does “unlawful” mean?
The word “unlawful” means against the law; not legally permitted. In plain terms, illegal — not allowed under the law.
How do you use “unlawful” in a sentence?
Here is “unlawful” used in a sentence: “It is unlawful to drive without a valid licence.”
What is the opposite of “unlawful”?
The opposite of “unlawful” — its antonyms — is lawful.
What part of speech is “unlawful”?
“Unlawful” is an adjective.
Is “unlawful” a common word?
“Unlawful” is an uncommon word in modern English.
What is the difference between unlawful and illegal?
Unlawful and illegal both mean against the law, and in most everyday contexts they are used interchangeably. Unlawful sometimes appears in more formal or legal writing, such as unlawful entry or unlawful detention, while illegal is more common in general speech.
What is the difference between unlawful and criminal?
Unlawful simply means not legally permitted and can apply to civil violations as well as more serious offences. Criminal specifically refers to conduct that is prosecuted under criminal law and can result in punishment such as fines or imprisonment, making it a narrower category.
Is unlawful a formal word?
Unlawful tends to appear more often in legal, official, or formal contexts than in casual conversation, where illegal is more commonly used. It is frequently seen in legal documents, statutes, and court rulings.