Meaning: The act of reversing or negating something.

Part of speech: noun

Example: His undoing was his lack of preparation.

Category: General

Synonyms:

• downfall
• collapse

Meaning: Not imagined or anticipated.

Part of speech: adjective

Example: They achieved undreamed-of success.

Category: General

Synonyms:

• unimagined
• unexpected

Meaning: A wave-like motion or form.

Part of speech: noun

Example: The undulation of the hills was beautiful.

Category: Nature

Synonyms:

• wave
• oscillation

Meaning: Never-ending; eternal.

Part of speech: adjective

Example: They shared an undying love for each other.

Category: General

Synonyms:

• eternal
• everlasting

Meaning: Strange or otherworldly.

Part of speech: adjective

Example: The music had an unearthly quality.

Category: Arts

Synonyms:

• strange
• otherworldly

Meaning: Not providing moral or intellectual improvement.

Part of speech: adjective

Example: The debate was considered unedifying.

Category: Education

Synonyms:

• uninspiring
• unimproving

Meaning: Not showing or expressing emotions.

Part of speech: adjective

Example: He remained unemotional during the discussion.

Category: Psychology

Synonyms:

• stoic
• impassive

Meaning: Too painful or severe to be tolerated.

Part of speech: adjective

Example: The pain was unendurable after the accident.

Category: General

Synonyms:

• intolerable
• unbearable

Meaning: Without equal; unmatched.

Part of speech: adjective

Example: Her talent is unequalled in the industry.

Category: General

Synonyms:

• unmatched
• peerless

Meaning: Always right or accurate.

Part of speech: adjective

Example: She had an unerring sense of direction.

Category: General

Synonyms:

• infallible
• accurate

Meaning: Not investigated or examined.

Part of speech: adjective

Example: The uncharted island remained unexplored.

Category: Science

Synonyms:

• untouched
• uninvestigated

Meaning: not wavering or faltering.

Part of speech: adjective

Example: Her unfaltering support was appreciated.

Category: General

Synonyms:

• steadfast
• resolute

Antonyms:

• faltering
• wavering

Meaning: impossible to understand or measure.

Part of speech: adjective

Example: The depths of the ocean are unfathomable.

Category: Science › Oceanography

Synonyms:

• incomprehensible
• mysterious

Antonyms:

• comprehensible
• understandable

Meaning: not possible to do or achieve.

Part of speech: adjective

Example: The plan was deemed unfeasible.

Category: Business › Project Management

Synonyms:

• impractical
• unworkable

Antonyms:

• feasible
• practical

Meaning: genuine or sincere.

Part of speech: adjective

Example: Her unfeigned joy was evident.

Category: General

Synonyms:

• sincere
• authentic

Antonyms:

• feigned
• insincere

Meaning: not restricted or bound.

Part of speech: adjective

Example: He enjoyed unfettered access to the resources.

Category: General

Synonyms:

• unrestricted
• free

Antonyms:

• fettered
• restricted

Meaning: not declining in strength or intensity.

Part of speech: adjective

Example: Her unflagging enthusiasm inspired everyone.

Category: General

Synonyms:

• tireless
• persistent

Antonyms:

• flagging
• tired

Meaning: not showing fear or hesitation.

Part of speech: adjective

Example: His unflinching gaze met hers.

Category: General

Synonyms:

• resolute
• steadfast

Antonyms:

• flinching
• hesitant

Meaning: not able to be predicted or anticipated.

Part of speech: adjective

Example: The accident was due to unforeseeable circumstances.

Category: General

Synonyms:

• unexpected
• unpredictable

Antonyms:

• foreseeable
• predictable

Meaning: not willing to forgive or show mercy.

Part of speech: adjective

Example: The unforgiving landscape was harsh.

Category: General

Synonyms:

• relentless
• merciless

Antonyms:

• forgiving
• merciful

Meaning: not willing to provide information.

Part of speech: adjective

Example: The witness was unforthcoming during the trial.

Category: Law

Synonyms:

• uncooperative
• reticent

Antonyms:

• forthcoming
• open

Meaning: extremely bad or immoral.

Part of speech: adjective

Example: The ungodly hours of work left him exhausted.

Category: General

Synonyms:

• immoral
• wicked

Antonyms:

• godly
• virtuous

Meaning: not able to be controlled or governed.

Part of speech: adjective

Example: The crowd became ung governable during the protest.

Category: Politics

Synonyms:

• uncontrollable
• chaotic

Antonyms:

• governable
• controllable

Meaning: a soothing or healing ointment.

Part of speech: noun

Example: She applied an unguent to the wound.

Category: Medicine › Dermatology

Synonyms:

• ointment
• salve

Meaning: a hoofed mammal, such as a horse or cow.

Part of speech: noun

Example: Horses are a type of ungulate.

Category: Nature › Zoology

Synonyms:

• hoofed animal
• quadruped

Meaning: United Nations High Commissioner for Refugees.

Part of speech: acronym

Example: The UNHCR provides aid to displaced persons.

Category: Politics › Human Rights

Meaning: not hesitating; acting promptly.

Part of speech: adjective

Example: She gave an unhesitating response.

Category: General

Synonyms:

• decisive
• prompt

Antonyms:

• hesitant
• indecisive

Meaning: not obstructed or impeded.

Part of speech: adjective

Example: She moved through the crowd unhindered.

Category: General

Synonyms:

• unobstructed
• free

Antonyms:

• hindered
• obstructed

Meaning: not holy; morally wrong or wicked.

Part of speech: adjective

Example: The unholy alliance shocked everyone.

Category: Religion

Synonyms:

• wicked
• immoral

Antonyms:

• holy
• virtuous

Meaning: having a single legislative chamber.

Part of speech: adjective

Example: The country has a unicameral parliament.

Category: Politics › Government

Synonyms:

• single-chambered
• one-house

Antonyms:

• bicameral
• two-chambered

Meaning: United Nations International Children's Emergency Fund.

Part of speech: acronym

Example: UNICEF works to protect children's rights.

Category: Politics › Human Rights

Meaning: A religious movement founded by Sun Myung Moon.

Part of speech: noun

Example: The Unification Church is known for its mass weddings.

Category: Religion

Meaning: The practice of acting alone without consulting others.

Part of speech: noun

Example: Unilateralism can lead to conflicts.

Category: Politics › International Relations

Synonyms: one-sidedness

Antonyms: multilateralism

Meaning: Not damaged or weakened.

Part of speech: adjective

Example: Her hearing was unimpaired despite the noise.

Category: Medicine › Health

Synonyms: intact

Antonyms: impaired

Meaning: Not able to be doubted or questioned.

Part of speech: adjective

Example: He has an unimpeachable reputation.

Category: Law › Ethics

Synonyms: indisputable

Antonyms: questionable

Meaning: Not changed in form to express grammatical functions.

Part of speech: adjective

Example: In English, many words are uninflected.

Category: Language › Grammar

Synonyms: unchanged

Meaning: Not able to be insured.

Part of speech: adjective

Example: The property was deemed uninsurable due to its location.

Category: Business › Insurance

Synonyms: uninsurable risk

Meaning: A member of a religious group that emphasizes individual freedom of belief.

Part of speech: noun

Example: The Unitarian community values diversity.

Category: Religion

Meaning: A news agency that provides news to various media outlets.

Part of speech: noun

Example: United Press International covers global news stories.

Category: Media

Meaning: Applicable to all cases or situations.

Part of speech: adjective

Example: The universal truth applies to everyone.

Category: Philosophy

Synonyms: general

Antonyms: specific