Meaning: In a way that is not wanted or desired.

Part of speech: adverb

Example: The situation developed undesirably.

Category: Society

Synonyms: unfavorably

Meaning: Not able to be discovered or identified.

Part of speech: adjective

Example: The virus was undetectable in the early stages.

Category: Science › Medicine

Synonyms:

• invisible
• hidden

Antonyms: detectable

Meaning: Not differentiated or distinct.

Part of speech: adjective

Example: The cells were undifferentiated and could develop into various types.

Category: Science › Biology

Synonyms:

• generic
• indistinct

Meaning: Not dignified; lacking in dignity.

Part of speech: adjective

Example: His behavior was considered undignified.

Category: General

Synonyms:

• shameful
• unseemly

Antonyms: dignified

Meaning: Not diluted; in its original strength.

Part of speech: adjective

Example: The undiluted juice was very sweet.

Category: Food

Synonyms:

• pure
• concentrated

Antonyms: diluted

Meaning: Not released from a duty or obligation.

Part of speech: adjective

Example: He remained undischarged from his responsibilities.

Category: Law

Synonyms: unreleased

Meaning: Not revealed or made known.

Part of speech: adjective

Example: The undisclosed amount was kept secret.

Category: Business

Synonyms:

• hidden
• secret

Meaning: Not concealed or hidden.

Part of speech: adjective

Example: Her undisguised joy was evident.

Category: General

Synonyms:

• open
• transparent

Meaning: Not remarkable or notable.

Part of speech: adjective

Example: His career was largely undistinguished.

Category: General

Synonyms:

• ordinary
• unremarkable

Meaning: Not divided; whole or complete.

Part of speech: adjective

Example: She gave her undivided attention to the lecture.

Category: General

Synonyms:

• whole
• entire

Antonyms: divided

Meaning: To detach a vessel from a dock.

Part of speech: verb

Example: The ship will undock at sunrise.

Category: Transportation

Synonyms:

• detach
• release

Meaning: Certain; without doubt.

Part of speech: adjective

Example: She is the undoubted leader of the team.

Category: General

Synonyms:

• unquestioned
• certain

Meaning: Excessive or unwarranted.

Part of speech: adjective

Example: He faced undue pressure to perform.

Category: General

Synonyms:

• excessive
• unwarranted

Meaning: To move in a wave-like motion.

Part of speech: verb

Example: The flag began to undulate in the breeze.

Category: Nature

Synonyms:

• wave
• sway

Meaning: Excessively or unreasonably.

Part of speech: adverb

Example: He was unduly concerned about the outcome.

Category: General

Synonyms:

• excessively
• unreasonably

Meaning: Not gained by effort or merit.

Part of speech: adjective

Example: He received unearned income from investments.

Category: Finance

Synonyms:

• unmerited
• unjustified

Meaning: To discover something hidden or buried.

Part of speech: verb

Example: Archaeologists aim to unearth ancient artifacts.

Category: Science › Archaeology

Synonyms:

• discover
• reveal

Meaning: Not economically viable or profitable.

Part of speech: adjective

Example: The project was deemed uneconomic.

Category: Business

Synonyms:

• unprofitable
• inefficient

Meaning: Not efficient in terms of cost.

Part of speech: adjective

Example: The old car was uneconomical to maintain.

Category: Business

Synonyms:

• inefficient
• wasteful

Meaning: Not chosen by election.

Part of speech: adjective

Example: The committee was made up of unelected members.

Category: Politics

Synonyms:

• appointed
• nominated

Meaning: Not able to be employed.

Part of speech: adjective

Example: Due to his lack of skills, he felt unemployable.

Category: Employment

Synonyms:

• unqualified
• unfit

Meaning: Not burdened or weighed down.

Part of speech: adjective

Example: She felt unencumbered by her responsibilities.

Category: General

Synonyms:

• free
• unburdened

Meaning: Without end; perpetual.

Part of speech: adjective

Example: The unending noise made it hard to concentrate.

Category: General

Synonyms:

• eternal
• ceaseless

Meaning: Not desirable; not worth envying.

Part of speech: adjective

Example: He had the unenviable task of delivering bad news.

Category: General

Synonyms:

• undesirable
• unattractive

Meaning: Leaving no doubt; clear and unambiguous.

Part of speech: adjective

Example: The results were unequivocal in their findings.

Category: General

Synonyms:

• clear
• definite

Meaning: Not conforming to accepted standards of morality.

Part of speech: adjective

Example: His actions were deemed unethical by the committee.

Category: Ethics

Synonyms:

• immoral
• unprincipled

Meaning: Not explained or clarified.

Part of speech: adjective

Example: There were many unexplained phenomena in the study.

Category: Science

Synonyms:

• unclear
• mysterious

Meaning: Not detonated; still intact.

Part of speech: adjective

Example: The area was cleared of unexploded ordnance.

Category: Military

Synonyms:

• intact
• undetonated

Meaning: always reliable or dependable.

Part of speech: adjective

Example: She has an unfailing sense of humor.

Category: General

Synonyms:

• constant
• reliable

Antonyms:

• failing
• unreliable

Meaning: not disturbed or disconcerted.

Part of speech: adjective

Example: She remained unfazed by the criticism.

Category: General

Synonyms:

• unperturbed
• calm

Antonyms:

• disturbed
• agitated

Meaning: lacking sensitivity or compassion.

Part of speech: adjective

Example: His unfeeling remarks hurt her feelings.

Category: General

Synonyms:

• insensitive
• callous

Antonyms:

• sensitive
• compassionate

Meaning: not properly equipped or adjusted.

Part of speech: adjective

Example: The unfit equipment caused issues.

Category: General

Synonyms:

• ill-suited
• inappropriate

Antonyms:

• fitted
• suitable

Meaning: not easily upset or disturbed.

Part of speech: adjective

Example: He remained unflappable during the crisis.

Category: General

Synonyms:

• calm
• composed

Antonyms:

• flappable
• nervous

Meaning: not forced or coerced; natural.

Part of speech: adjective

Example: Her laughter was unforced and genuine.

Category: General

Synonyms:

• natural
• spontaneous

Antonyms:

• forced
• artificial

Meaning: not able to be forgiven; inexcusable.

Part of speech: adjective

Example: His actions were unforgivable.

Category: General

Synonyms:

• inexcusable
• unjustifiable

Antonyms:

• forgivable
• excusable

Meaning: not yet developed or shaped.

Part of speech: adjective

Example: The idea was still unformed.

Category: General

Synonyms:

• undeveloped
• raw

Antonyms:

• formed
• developed

Meaning: not based on fact or reason.

Part of speech: adjective

Example: The rumors were unfounded.

Category: General

Synonyms:

• baseless
• groundless

Antonyms:

• founded
• substantiated

Meaning: not behaving in a manner considered gentlemanly.

Part of speech: adjective

Example: His actions were deemed ungentlemanly.

Category: General

Synonyms:

• rude
• uncivil

Antonyms:

• gentlemanly
• courteous

Meaning: not stuck together; disorganized.

Part of speech: adjective

Example: The project fell apart because it was unguided and unglued.

Category: General

Synonyms:

• disorganized
• chaotic

Antonyms:

• organized
• cohesive

Meaning: not polite or courteous.

Part of speech: adjective

Example: His ungracious remarks offended many.

Category: General

Synonyms:

• rude
• impolite

Antonyms:

• gracious
• courteous