Meaning: Not conforming to accepted standards of morality.

Part of speech: adjective

Example: The immoral act shocked the community.

Category: Ethics

Synonyms:

• unethical
• wrong

Antonyms:

• moral
• ethical

Meaning: To make someone or something remembered forever.

Part of speech: verb

Example: The artist aimed to immortalize her subjects in her paintings.

Category: Arts

Synonyms:

• eternalize
• commemorate

Antonyms:

• forget
• erase

Meaning: A mischievous child or creature.

Part of speech: noun

Example: The imp played tricks on the villagers.

Category: Arts

Synonyms:

• rascal
• trickster

Meaning: To pierce or stab with a sharp object.

Part of speech: verb

Example: The spear was used to impale the fish.

Category: Arts

Synonyms:

• pierce
• stab

Antonyms:

• withdraw
• remove

Meaning: Not able to be traveled or crossed.

Part of speech: adjective

Example: The road was impassable due to heavy snow.

Category: Nature

Synonyms:

• unreachable
• blocked

Antonyms:

• passable
• accessible

Meaning: A situation in which no progress is possible.

Part of speech: noun

Example: The negotiations reached an impasse.

Category: Politics

Synonyms:

• deadlock
• stalemate

Antonyms:

• breakthrough
• solution

Meaning: Filled with intense feeling or passion.

Part of speech: adjective

Example: She gave an impassioned speech about climate change.

Category: Arts

Synonyms:

• fervent
• ardent

Antonyms:

• apathetic
• indifferent

Meaning: In accordance with the highest standards; faultless.

Part of speech: adjective

Example: Her performance was impeccable.

Category: Arts

Synonyms:

• flawless
• perfect

Antonyms:

• faulty
• imperfect

Meaning: A hindrance or obstruction in doing something.

Part of speech: noun

Example: His speech impediment made it hard for him to communicate.

Category: Health

Synonyms:

• obstacle
• barrier

Antonyms:

• aid
• help

Meaning: Of vital importance; crucial.

Part of speech: adjective

Example: It is imperative that we act quickly.

Category: Business

Synonyms:

• essential
• urgent

Antonyms:

• optional
• unimportant

Meaning: A fault or flaw.

Part of speech: noun

Example: She accepted her imperfection as part of being human.

Category: Arts

Synonyms:

• flaw
• defect

Antonyms:

• perfection
• flawlessness

Meaning: Relating to an empire or emperor.

Part of speech: adjective

Example: The imperial palace was grand and majestic.

Category: History

Synonyms:

• royal
• regal

Antonyms:

• common
• ordinary

Meaning: Not influenced by or showing personal feelings.

Part of speech: adjective

Example: The report was very impersonal and factual.

Category: Communication

Synonyms:

• objective
• neutral

Antonyms:

• personal
• subjective

Meaning: A person who pretends to be someone else, often for entertainment.

Part of speech: noun

Example: The impersonator made everyone laugh with his impressions.

Category: Arts

Synonyms:

• imitator
• mimic

Antonyms:

• original
• authentic

Meaning: Having an impressive appearance; grand.

Part of speech: adjective

Example: The imposing castle stood on the hill.

Category: Architecture

Synonyms:

• impressive
• grand

Antonyms:

• unimpressive
• ordinary

Meaning: Relating to or characteristic of Impressionism.

Part of speech: adjective

Example: The impressionistic style of painting captures fleeting moments.

Category: Arts › Visual Arts

Synonyms: artistic

Meaning: Done without being planned or rehearsed.

Part of speech: adjective

Example: They gave an impromptu speech at the event.

Category: General

Synonyms:

• unplanned
• improvised

Meaning: Improper behavior or conduct.

Part of speech: noun

Example: The impropriety of his actions led to his dismissal.

Category: General

Synonyms: misconduct

Meaning: Not showing care for the consequences of an action; rash.

Part of speech: adjective

Example: It was imprudent to invest all his savings in one stock.

Category: General

Synonyms:

• reckless
• unwise

Antonyms: prudent

Meaning: Not showing respect; rude.

Part of speech: adjective

Example: His impudent remarks offended many people.

Category: General

Synonyms:

• insolent
• disrespectful

Antonyms: respectful

Meaning: Acting on impulse; spontaneous.

Part of speech: adjective

Example: Her impulsive decision surprised everyone.

Category: General

Synonyms:

• hasty
• rash

Antonyms: deliberate

Meaning: The quality of being impure; contamination.

Part of speech: noun

Example: The impurity of the substance made it unusable.

Category: General

Synonyms: contamination

Meaning: A prefix meaning 'not' or 'without'.

Part of speech: prefix

Example: The word 'incomplete' uses the prefix 'in-'.

Category: General

Meaning: In the original place or position.

Part of speech: adverb

Example: The fossils were found in situ.

Category: Science

Synonyms:

• on-site
• in place

Antonyms:

• off-site
• displaced

Meaning: In an artificial environment outside a living organism.

Part of speech: adverb

Example: The experiment was conducted in vitro.

Category: Science › Biology

Synonyms: outside the body

Meaning: Not able to be reached or accessed.

Part of speech: adjective

Example: The mountain peak is often inaccessible during winter.

Category: General

Synonyms: unreachable

Antonyms: accessible

Meaning: The quality of being inaccurate; a mistake.

Part of speech: noun

Example: The report was criticized for its inaccuracy.

Category: General

Synonyms:

• error
• mistake

Meaning: Lack of action or activity.

Part of speech: noun

Example: His inaction during the crisis was criticized.

Category: General

Synonyms: inaction

Antonyms: action

Meaning: The state of being inadequate; insufficiency.

Part of speech: noun

Example: The inadequacy of resources was evident.

Category: General

Synonyms: insufficiency

Meaning: Not resulting from or achieved through deliberate planning; unintentional.

Part of speech: adjective

Example: The inadvertent error was quickly corrected.

Category: General

Synonyms: unintentional

Meaning: Not wise or prudent; unwise.

Part of speech: adjective

Example: It is inadvisable to drive without a license.

Category: General

Synonyms: unwise

Meaning: Silly or stupid; lacking sense.

Part of speech: adjective

Example: His inane comments made everyone laugh.

Category: General

Synonyms:

• foolish
• silly

Antonyms: sensible

Meaning: Not relevant or suitable in a particular situation.

Part of speech: adjective

Example: The rule was deemed inapplicable to this case.

Category: General

Synonyms: irrelevant

Meaning: Lack of attention; neglect.

Part of speech: noun

Example: His inattention during the lecture was obvious.

Category: General

Synonyms: neglect

Meaning: Marking the beginning of an event or period.

Part of speech: adjective

Example: The inaugural ceremony was attended by many dignitaries.

Category: General

Synonyms:

• initial
• opening

Meaning: To formally begin or introduce something.

Part of speech: verb

Example: They will inaugurate the new building next week.

Category: General

Synonyms:

• initiate
• launch

Meaning: Towards the inside of a ship or aircraft.

Part of speech: adverb

Example: The crew moved inboard during the storm.

Category: General

Synonyms: inside

Meaning: Existing from birth; innate.

Part of speech: adjective

Example: She has an inborn talent for music.

Category: General

Synonyms:

• innate
• natural

Meaning: Built-in; an integral part of something.

Part of speech: adjective

Example: The software has an inbuilt feature for security.

Category: Technology › Software

Synonyms: integrated

Meaning: Short for incorporated, indicating a corporation.

Part of speech: abbreviation

Example: The company is called Tech Innovations, Inc.

Category: Business