Vocabulary Words Starting With I

A person who challenges or attacks widely accepted beliefs, traditions, or institutions.

Peculiar to a specific individual, reflecting a personal quirk rather than any general pattern.

Bringing public shame or disgrace, especially through a humiliating failure.

Not allowed by law or social custom; forbidden.

To become completely involved in an activity, or to put something fully into a liquid.

About to happen very soon.

To confine or imprison someone within walls.

Not able to be changed or altered.

Not favoring one side over another, treating every party with equal fairness.

Showing no visible emotion or reaction, even in a moment that would normally provoke one.

Flawless, in accordance with the highest standards, without any fault.

To slow down or block the progress of something.

So important or urgent that it demands immediate attention or action.

Commanding others in a haughty, entitled manner, as though obedience is owed automatically.

Not able to be affected or penetrated by something.

Acting on sudden impulse with little thought for what might happen next.

A force or influence that causes something to happen or gather speed.

Impossible to calm down or satisfy; relentlessly unforgiving.

To put a plan, decision, or system into actual practice.

Suggested or understood without being stated in direct words.

To officially force a rule, tax, or condition onto someone.

Done on the spur of the moment, without any advance planning or rehearsal.

To attack or cast doubt on someone's honesty, character, or motives, usually through pointed argument.

To attribute a fault, quality, or intention to someone, often unfairly.

Happening by accident, without intention or awareness.

Something offered or promised that encourages a person to act in a particular way.

Continuing on and on without any pause, often to an irritating degree.

Just begun and not yet fully formed or developed.

Expressing ideas in a sharp, direct, and highly accurate way.

To stir people up until they take some strong or unruly action.

Out of place; not fitting with its surroundings or with what would normally be expected.

Not important enough to have any real effect or significance.

To include something as a working part of a larger whole.

So set in a bad habit that no amount of correction or punishment seems to fix it.

Currently holding an official position, or necessary as a duty for someone.

Never growing tired, no matter how much effort or time a task requires.

To formally charge someone with a crime.

Having no particular interest, concern, or preference about something.

Originating naturally in a particular place rather than arriving from somewhere else.

Angry because something feels unjust or beneath one's dignity.

So important or useful that a person or thing cannot be done without.

Habitually lazy; inclined to avoid effort or activity.

To cause a particular state, reaction, or condition to happen.

Too intense or overwhelming to be expressed adequately in words.

Lacking basic skill at a task, so clumsy that the results are obviously poor.

A strong tendency to stay in the same state or keep doing the same thing without change.

Certain to happen and impossible to avoid.

Impossible to stop, persuade, or turn aside from a relentless course.

To work out a conclusion from evidence and reasoning rather than from a direct statement.

Extremely clever and original, especially in solving a problem.

Openly sincere and trusting, sometimes to the point of naivety.

Existing as a natural and permanent part of something rather than added from outside.

To hold back or restrict a process, action, or feeling.

Harmful or actively hostile to someone's interests or well-being.

Present in a person from birth rather than learned later through practice.

Harmless; unlikely to cause offense or damage.

Using new ideas or methods that had not been tried before.

Having a strong curiosity and desire to learn or ask questions about things.

Impossible to read or understand clearly, especially someone's thoughts or feelings.

Causing harm gradually and quietly, so that the damage isn't noticed until it's already serious.

A clear, deep understanding of a complex situation or problem.

Showing an unusually clear and deep understanding of a situation or subject.

Boldly disrespectful in speech or behavior toward someone owed respect.

To set an action or conflict in motion, especially one that stirs up trouble.

Narrow-minded as a result of isolation, and unwilling to consider outside ideas or people.

Not able to be touched or physically measured, though still real.

So necessary to a whole that the whole would be incomplete without it.

Starting and stopping again and again instead of happening continuously.

To become involved in a situation in order to change what happens, often to stop a problem.

So difficult to manage or resolve that ordinary efforts simply fail against it.

Refusing to compromise or change one's position, even under pressure.

Showing fearless resolve when facing danger or difficulty.

Made up of many finely detailed parts that fit together in a complicated way.

To make someone very curious or interested in something.

Belonging to something as one of its basic, essential features rather than added later.

Understood immediately through instinct or feeling rather than step-by-step reasoning.

To overwhelm someone or something with a huge, sudden amount.

Always, in every single case, without exception.

Settled into a habit so long-standing that it has become part of someone's basic character.

To fill someone with fresh energy and enthusiasm.

To mention or use a law, rule, or idea as a reason for an action, or to call upon something.

Easily provoked to anger; quick-tempered.

So strongly supported by evidence that it cannot reasonably be denied or proven false.

Impossible to change or take back once it has already been done.

To repeat a process again and again, often refining it slightly each time.