Roots Vocabulary Review - English 12

This set of flashcards includes key vocabulary roots, their definitions, and sample words to aid in understanding and retention of English vocabulary.

circ

Round, around

diameter

A line segment that passes through the center of a circle and has its endpoints on the circle.

circumference

The enclosing boundary around a circular area.

circumvent

To find a way around (an obstacle).

dia

Across, through

diaphragm

A muscle that separates the thoracic cavity from the abdominal cavity, aiding in respiration.

diagnose

To identify the nature of an illness or problem by examination of the symptoms.

dis

Apart

disapprove

To have an unfavorable opinion of something.

dissect

To cut apart for the purpose of investigation.

equi

Equal

equidistant

At equal distances.

equivalence

The condition of being equal or equivalent in value.

equity

The quality of being fair and impartial.

extra

Outside, above

extraordinary

Very unusual or remarkable.

extraterrestrial

Of or from outside the Earth or its atmosphere.

extrovert

A person who is outgoing and focuses on external stimuli.

intra/o

Within

intravenous

Existing or taking place within a vein.

introvert

A person who is shy or reserved and tends to focus on their own inner thoughts.

intramural

Involving only students at the same school or college.

inter

Between/among

interval

A pause or break in an activity.

international

Existing, occurring, or carried on between nations.

ir

Not

irresponsible

Not showing a proper sense of responsibility.

irrational

Not logical or reasonable.

Irredeemable

Not able to be saved, improved, or corrected.

mal

Bad

malfunction

To fail to function normally or satisfactorily.

malnutrition

Lack of proper nutrition.

malicious

Intended to do harm.

mid

Middle

midriff

The part of the body between the chest and the abdomen.

midterm

An examination in the middle of an academic term.

midday

The middle of the day.

mis

Wrong

mispronounce

To pronounce a word incorrectly.

misbehave

To behave badly.

misguided

Having or showing faulty judgment.

per

Through, throughout

pervade

To spread through and be perceived in every part.

permanent

Lasting or intended to last or remain unchanged indefinitely.

permeate

To spread throughout.

peri

Around

periscope

An instrument used to see things that are out of direct sight.

peripheral

Related to or situated on the edge or periphery.

perimeter

The continuous line forming the boundary of a closed geometrical figure.

post

After, behind

postpone

To cause or arrange for something to take place at a time later than that first scheduled.

posthumous

Occurring, awarded, or appearing after the death of the originator.

postpartum

After childbirth.

pseudo

False

pseudonym

A fictitious name.

pseudoscience

A collection of beliefs or practices mistakenly regarded as being based on the scientific method.

pseudointellectual

A person who pretends an interest in intellectual matters.