Synonyms of illicit

illicit

adjective

(ˌ)i(l)-ˈli-sət 

as in illegal

contrary to or forbidden by law

had a long history of using illicit drugs

Synonyms & Similar Words

• illegal
• unlawful
• criminal
• felonious
• unauthorized
• wrongful
• forbidden
• illegitimate
• prohibited
• lawless
• immoral
• sinful
• criminalized
• evil
• unethical
• shameful
• wrong
• wicked
• unsanctioned
• bad
• unlicensed
• contraband
• reprehensible
• proscribed
• under-the-table
• outlawed
• unscrupulous
• blameworthy
• corrupt
• discouraged
• barred
• disallowed
• censurable
• interdicted
• banned
• villainous
• unprincipled
• under-the-counter
• bootleg
• blamable
• adulterine

Antonyms & Near Antonyms

• legal
• legitimate
• lawful
• good
• ethical
• right
• permitted
• righteous
• virtuous
• just
• authorized
• principled
• licensed
• approved
• endorsed
• proper
• correct
• allowed
• promoted
• supported
• sanctioned
• decent
• suggested
• encouraged
• abetted
• decorous
• seemly

Example Sentences

Recent Examples of illicit

FinCEN is the Financial Crimes Enforcement Network, which combats money laundering, illicit financial activities and terrorist financing networks around the world. — Steve Kopack, NBC news, 13 Oct. 2026

But not every warning about illicit liquor was a scare tactic. — Stephanie Nolasco, FOXNews.com, 13 Oct. 2026

The group’s president and CEO, Steve Lamar, said the AAFA is urging stronger action against platforms that enable the trade of dupes and fakes, which can be dangerous to consumers as the illicit goods are produced through unregulated operations. — Kate Nishimura, Footwear News, 9 Oct. 2026

Both local and federal investigators are investigating the source and supplier of the illicit drugs. — ABC News, 9 Oct. 2026