Meaning: To burn something completely to ashes.

Part of speech: verb

Example: They decided to incinerate the old documents for security.

Category: Science › Environmental Science

Synonyms:

• burn
• cremate

Meaning: In an initial stage; beginning to develop.

Part of speech: adjective

Example: The incipient signs of the disease were detected early.

Category: Science › Medicine

Synonyms:

• initial
• emerging

Antonyms:

• mature
• developed

Meaning: A type of tooth used for cutting food.

Part of speech: noun

Example: Humans have four incisors in each quadrant of their mouth.

Category: Science › Dentistry

Synonyms: cutting tooth

Meaning: Not leading to a firm conclusion.

Part of speech: adjective

Example: The results of the experiment were inconclusive.

Category: Science › Research

Synonyms:

• indeterminate
• uncertain

Antonyms:

• definitive
• conclusive

Meaning: To keep something in a controlled environment to develop.

Part of speech: verb

Example: The scientist will incubate the samples for a week.

Category: Science › Biology

Synonyms:

• develop
• cultivate

Meaning: A device used to maintain a controlled environment for developing organisms.

Part of speech: noun

Example: The eggs were placed in an incubator to hatch.

Category: Science › Biology

Synonyms:

• hatching device
• brooder

Meaning: Relating to reasoning from specific cases to general principles.

Part of speech: adjective

Example: Inductive reasoning helps in forming hypotheses.

Category: Science › Logic

Synonyms:

• inferential
• deductive

Meaning: Lacking the ability or strength to move.

Part of speech: adjective

Example: The inert body lay on the ground.

Category: Science › Physics

Synonyms:

• motionless
• inactive

Antonyms:

• active
• mobile

Meaning: The tendency of an object to remain at rest or in motion unless acted upon by a force.

Part of speech: noun

Example: Inertia keeps the car moving until the brakes are applied.

Category: Science › Physics

Synonyms:

• stagnation
• inactivity

Antonyms:

• activity
• motion

Meaning: Not accurate or precise.

Part of speech: adjective

Example: The measurements were inexact and needed adjustment.

Category: Science › Measurement

Synonyms:

• imprecise
• vague

Antonyms:

• exact
• precise

Meaning: Unable to be explained or understood.

Part of speech: adjective

Example: The phenomenon was inexplicable to the scientists.

Category: Science

Synonyms:

• unexplainable
• mysterious

Meaning: Relating to electromagnetic radiation with wavelengths longer than visible light.

Part of speech: adjective

Example: Infrared cameras can detect heat.

Category: Science

Synonyms: heat radiation

Meaning: Not consisting of or deriving from living matter.

Part of speech: adjective

Example: Inorganic compounds are essential in chemistry.

Category: Science › Chemistry

Synonyms:

• non-organic
• artificial

Antonyms:

• organic
• natural

Meaning: the arrangement of instruments in a piece of music

Part of speech: noun

Example: The instrumentation of the symphony was complex.

Synonyms:

• arrangement
• equipment

Meaning: not solid or strong

Part of speech: adjective

Example: The evidence was deemed insubstantial.

Category: Science

Synonyms:

• weak
• fragile

Antonyms:

• substantial
• strong

Meaning: to protect something by surrounding it with material that prevents the passage of heat, electricity, or sound

Part of speech: verb

Example: They will insulate the house to save energy.

Category: Science › Engineering

Synonyms:

• protect
• shield

Antonyms:

• expose
• reveal

Meaning: material used to insulate something

Part of speech: noun

Example: The insulation in the walls keeps the house warm.

Category: Science › Engineering

Synonyms:

• protection
• covering

Antonyms:

• exposure
• revelation

Meaning: a material or device that prevents the passage of electricity, heat, or sound

Part of speech: noun

Example: Rubber is a good insulator for electrical wires.

Category: Science › Engineering

Synonyms:

• separator
• barrier

Antonyms:

• conductor
• transmitter

Meaning: Located within something; inner.

Part of speech: adjective

Example: The internal structure of the building is complex.

Category: Science

Synonyms:

• inner
• inside

Antonyms: external

Meaning: Existing or occurring between stars.

Part of speech: adjective

Example: The interstellar space is vast and mostly empty.

Category: Science › Astronomy

Synonyms:

• cosmic
• galactic

Meaning: To create something new.

Part of speech: verb

Example: She wants to invent a new type of battery.

Category: Science › Innovation

Synonyms:

• create
• devise

Meaning: The act of creating something new.

Part of speech: noun

Example: The invention of the internet changed communication.

Category: Science › Innovation

Synonyms:

• creation
• innovation

Meaning: Having the ability to create or think of new ideas.

Part of speech: adjective

Example: She is very inventive and often comes up with unique solutions.

Category: Science › Innovation

Synonyms:

• creative
• original

Antonyms:

• unimaginative
• uninspired

Meaning: A person who creates something new.

Part of speech: noun

Example: Thomas Edison was a famous inventor.

Category: Science › Innovation

Synonyms:

• creator
• innovator

Meaning: An animal without a backbone.

Part of speech: noun

Example: Jellyfish are a type of invertebrate.

Category: Science › Biology

Synonyms:

• creature
• animal

Meaning: Unable to be seen; not visible.

Part of speech: adjective

Example: The invisible ink can only be seen under UV light.

Category: Science

Synonyms:

• unseen
• hidden

Antonyms: visible

Meaning: A chemical element used in medicine and photography.

Part of speech: noun

Example: Iodine is often used as a disinfectant.

Category: Science › Chemistry

Synonyms:

• element
• chemical

Meaning: An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Part of speech: noun

Example: An ion can be positively or negatively charged.

Category: Science › Chemistry

Synonyms:

• charged particle
• atom

Meaning: Showing luminous colors that seem to change when seen from different angles.

Part of speech: adjective

Example: The iridescent surface of the soap bubble was beautiful.

Category: Science › Optics

Synonyms:

• shimmering
• rainbow-colored

Meaning: A strong, hard magnetic silvery-gray metal used for construction and manufacturing.

Part of speech: noun

Example: The bridge is made of iron.

Category: Science › Chemistry

Synonyms:

• metal
• element

Meaning: To expose to radiation or light.

Part of speech: verb

Example: The food was irradiated to kill bacteria.

Category: Science › Physics

Synonyms:

• expose
• radiate

Meaning: Not able to be undone or altered.

Part of speech: adjective

Example: The damage to the environment is irreversible.

Category: Science

Synonyms:

• permanent
• irreparable

Antonyms:

• reversible
• temporary

Meaning: Variants of a chemical element that have the same number of protons but different numbers of neutrons.

Part of speech: noun

Example: Carbon-14 is a well-known isotope used in dating.

Category: Science › Chemistry

Synonyms:

• variant
• nuclide

Meaning: A fast-flowing air current in the atmosphere.

Part of speech: noun

Example: The jet stream can affect weather patterns.

Category: Science › Meteorology

Synonyms: air current

Meaning: A place where two or more things are connected.

Part of speech: noun

Example: The joint between the two pieces of wood was strong.

Category: Science › Anatomy

Synonyms:

• connection
• junction

Meaning: Having joints; articulated.

Part of speech: adjective

Example: The jointed doll could move its arms and legs.

Category: Science › Anatomy

Synonyms:

• articulated
• connected

Meaning: A plant whose seeds produce a liquid wax used in cosmetics and skin care.

Part of speech: noun

Example: Jojoba oil is popular in moisturizers.

Category: Science › Botany

Synonyms:

• oil
• wax

Meaning: To move suddenly and sharply; to shock.

Part of speech: verb

Example: The car jolted when it hit the pothole.

Category: Science › Physics

Synonyms:

• shock
• jolt

Meaning: A unit of energy in the International System of Units (SI).

Part of speech: noun

Example: The light bulb uses about 60 joules of energy.

Category: Science › Physics

Synonyms:

• energy unit
• measurement

Meaning: a tube-shaped optical instrument that creates colorful patterns

Part of speech: noun

Example: The children played with a kaleidoscope to see different designs.

Category: Science › Optics