Meaning: The system of government by a tzar.

Part of speech: noun

Example: Tzarism was characterized by autocratic rule.

Category: History › Governance

Synonyms: czarism

Meaning: Relating to a tzar or tzarism.

Part of speech: adjective

Example: The tzarist regime faced many challenges.

Category: History › Governance

Synonyms: czarist

Meaning: Economic activity that is not regulated by the government.

Part of speech: noun

Example: Many people work in the underground economy to avoid taxes.

Category: Economics

Synonyms: shadow economy

Meaning: The person or people who have signed a document.

Part of speech: noun

Example: The under-signed agree to the terms of the contract.

Category: Legal

Synonyms: signatory

Meaning: People who lack knowledge or experience in a particular area.

Part of speech: noun

Example: The topic was confusing for the uninitiated.

Category: Education

Synonyms: novices

Antonyms: experts

Meaning: A Christian denomination in Scotland.

Part of speech: noun

Example: The United Free Church emphasizes social justice.

Category: Religion

Meaning: A soldier whose identity is not known, often honored in memorials.

Part of speech: noun

Example: The Unknown Soldier represents all fallen soldiers.

Category: History › Military

Meaning: abbreviation for 'Ulster Defence Association'

Part of speech: abbreviation

Example: The UDA was involved in the conflict in Northern Ireland.

Category: Politics › Conflict

Meaning: abbreviation for 'Ulster Defence Regiment'

Part of speech: abbreviation

Example: The UDR was a part of the British Army in Northern Ireland.

Category: Politics › Military

Meaning: beyond the powers or authority

Part of speech: phrase

Example: The decision was deemed ultra vires by the court.

Category: Law

Meaning: Not able to be taken away or denied.

Part of speech: adjective

Example: Everyone has unalienable rights.

Category: Law

Synonyms:

• inviolable
• indefeasible

Antonyms:

• alienable
• transferable

Meaning: Not able to be changed or altered.

Part of speech: adjective

Example: The rules were unalterable.

Category: Law

Synonyms:

• immutable
• fixed

Antonyms:

• alterable
• changeable

Meaning: Not in accordance with American values or principles.

Part of speech: adjective

Example: His actions were deemed un-American.

Category: Politics

Synonyms:

• unpatriotic
• anti-American

Antonyms:

• American
• patriotic

Meaning: Complete agreement among all members.

Part of speech: noun

Example: The decision was made with unanimity.

Category: Politics

Synonyms:

• consensus
• agreement

Antonyms:

• disagreement
• dissent

Meaning: Not able to be answered or explained.

Part of speech: adjective

Example: The question was deemed unanswerable.

Category: Education

Synonyms:

• insoluble
• unresolvable

Antonyms:

• answerable
• solvable

Meaning: Not expressing regret or remorse.

Part of speech: adjective

Example: He was unapologetic about his decision.

Category: Psychology

Synonyms:

• unrepentant
• defiant

Antonyms:

• apologetic
• remorseful

Meaning: Not open to argument; indisputable.

Part of speech: adjective

Example: The evidence provided was unarguable.

Category: Logic

Synonyms:

• indisputable
• incontrovertible

Antonyms:

• arguable
• disputable

Meaning: Involving only one element or component.

Part of speech: adjective

Example: A unary operation requires only one operand.

Category: Mathematics

Synonyms:

• single
• onefold

Antonyms:

• binary
• multiple

Meaning: Unable to be attacked or questioned.

Part of speech: adjective

Example: His argument was unassailable.

Category: Logic

Synonyms:

• indisputable
• irrefutable

Antonyms:

• assailable
• questionable

Meaning: Not known or recognized.

Part of speech: adjective

Example: Unbeknown to her, a surprise party was being planned.

Category: Communication

Synonyms:

• unknown
• unrecognized

Antonyms:

• known
• recognized

Meaning: To refuse to accept something as true.

Part of speech: verb

Example: I cannot unbelieve what I just saw.

Category: Psychology

Synonyms:

• disbelieve
• reject

Antonyms:

• believe
• accept

Meaning: To release from binding or attachment.

Part of speech: verb

Example: Please unbind the pages of the book.

Category: Arts › Literature

Synonyms:

• release
• detach

Antonyms:

• bind
• attach

Meaning: Not blinking; steady and unwavering.

Part of speech: adjective

Example: He stared at her with unblinking eyes.

Category: General

Synonyms:

• steady
• unwavering

Antonyms:

• blinking
• faltering

Meaning: Not able to be crossed or overcome.

Part of speech: adjective

Example: The differences between them seemed unbridgeable.

Category: Communication

Synonyms:

• insurmountable
• unresolvable

Antonyms:

• bridgeable
• overcome

Meaning: To free from restraint or control.

Part of speech: verb

Example: He wanted to unbridle his creativity.

Category: General

Synonyms:

• release
• free

Antonyms:

• restrain
• control

Meaning: Not stopping; continuous.

Part of speech: adjective

Example: The unceasing noise made it hard to concentrate.

Category: Science › Physics

Synonyms:

• constant
• relentless

Antonyms:

• ceasing
• stopping

Meaning: Not subject to censorship; unedited.

Part of speech: adjective

Example: The uncensored version of the film was quite shocking.

Category: Media › Film

Synonyms:

• uncut
• unfiltered

Antonyms:

• censored
• edited

Meaning: Not able to be challenged or disputed.

Part of speech: adjective

Example: His authority was unchallengeable in the organization.

Category: Law

Synonyms:

• indisputable
• unquestionable

Antonyms:

• challengeable
• disputable

Meaning: Not able to be changed.

Part of speech: adjective

Example: The rules are unchangeable once set.

Category: Law

Synonyms:

• immutable
• fixed

Antonyms:

• changeable
• flexible

Meaning: Not mapped or explored.

Part of speech: adjective

Example: They ventured into uncharted territory.

Category: Geography

Synonyms:

• unknown
• unexplored

Antonyms:

• charted
• explored

Meaning: Not in accordance with Christian principles.

Part of speech: adjective

Example: His actions were deemed unchristian by the community.

Category: Religion

Synonyms:

• immoral
• ungodly

Antonyms:

• Christian
• moral

Meaning: Not cultured or refined; primitive.

Part of speech: adjective

Example: The uncivilised behavior shocked the guests.

Category: Sociology

Synonyms:

• primitive
• barbaric

Antonyms:

• civilized
• cultured

Meaning: Refusing to make concessions or compromises.

Part of speech: adjective

Example: She has an uncompromising attitude towards her principles.

Category: Politics

Synonyms:

• inflexible
• unyielding

Antonyms:

• flexible
• yielding

Meaning: Lack of interest or worry.

Part of speech: noun

Example: His unconcern about the situation surprised everyone.

Category: Psychology

Synonyms:

• indifference
• apathy

Antonyms:

• concern
• interest

Meaning: Not subject to conditions; innate.

Part of speech: adjective

Example: Unconditioned responses are natural reactions.

Category: Psychology › Behaviorism

Synonyms:

• innate
• natural

Antonyms:

• conditioned
• learned

Meaning: Not suitable or agreeable; unfriendly.

Part of speech: adjective

Example: The atmosphere was uncongenial for a productive meeting.

Category: Social

Synonyms:

• unfriendly
• hostile

Antonyms:

• friendly
• agreeable

Meaning: Not able to be defeated or overcome.

Part of speech: adjective

Example: Her spirit was unconquerable despite the challenges.

Category: Philosophy

Synonyms:

• invincible
• unbeatable

Antonyms:

• conquerable
• defeatable

Meaning: Not guided by conscience; unreasonable.

Part of speech: adjective

Example: The prices were deemed unconscionable by the community.

Category: Law › Ethics

Synonyms:

• unethical
• immoral

Antonyms:

• ethical
• moral

Meaning: The state of being unaware or not awake.

Part of speech: noun

Example: He slipped into unconsciousness after the fall.

Category: Medicine › Neurology

Synonyms:

• insensibility
• coma

Antonyms:

• consciousness
• awareness

Meaning: Not thought about or taken into account.

Part of speech: adjective

Example: His unconsidered remarks caused confusion.

Category: Education

Synonyms:

• thoughtless
• unreflective

Antonyms:

• considered
• thoughtful