Synonyms of unprincipled

unprincipled

adjective

ˌən-ˈprin(t)-s(ə-)pəld 

as in immoral

not guided by or showing a concern for what is right

an unprincipled businessman who made a lot of money—and didn't care how he did it

Synonyms & Similar Words

• immoral
• ruthless
• unscrupulous
• corrupt
• unethical
• Machiavellian
• unconscionable
• cutthroat
• merciless
• dishonest
• crooked
• deceitful
• pitiless
• remorseless
• depraved
• opportunistic
• calculating
• licentious
• degenerate
• profligate
• libertine
• debauched
• debased
• degraded
• knavish
• demoralized
• decadent
• scheming
• dissipated
• jackleg
• dog-eat-dog
• cheapjack
• sharp

Antonyms & Near Antonyms

• moral
• ethical
• principled
• scrupulous
• honorable
• noble
• good
• virtuous
• righteous
• conscientious
• just

Example Sentences

Recent Examples of unprincipled

In every era a certain kind of unprincipled demagogue driven by an insatiable need for attention and a sense of what will capture the public’s imagination rises to the fore. — Mark Lilla, The New York Review of Books, 5 Mar. 2026

In the past, that’s opened small businesses to frivolous lawsuits filed by unprincipled lawyers that file massive lawsuits and offer quick settlements. — Erica Goldstein, Boston Herald, 9 Sep. 2025

Rule by ‘ambitious, and unprincipled men’ Partisanship is the primary problem for the American republic, according to Washington. — Robert A. Strong, The Conversation, 8 Sep. 2025

Yet Aster casts their motives as unprincipled and self-serving. — Richard Brody, New Yorker, 5 Sep. 2025