What are "Root Words"?

A root, or root word is a word which is used to form another word. It is also called a base word. A root does not have a prefix (a letter or group of letters added to the beginning of a word) or a suffix (a letter or group of letters added to the end of a word).
Root is the primary lexical unit of a word, and of a word family.

For example, pure is a root. By adding prefixes and suffixes, the following words could be made:
impure, purity, pureness

Similarly, play and move are root words. By adding prefixes and suffixes, the following words could be made:
plays, played, playing, player
moving, movement, moved, movable, mover, movingly

In this book, I have given the most common Greek and Latin roots which are used in English language.

Sample This:

Root Words — A

AB/ABS
Origin: Latin | Meaning: away, from, off
Examples:
abate — to subside
abject — hopeless
abjure — to renounce
abnormal — unusual | related words: abnormally, abnormality
abroad — out of the country
abscess — swelling
abscond — to run away | related word: absconder
abseil — to go down a steep cliff
absence — nonattendance | related words: absent, absentee, absenteeism, absentia, absently
absolve — to forgive
absorb — to soak up | related words: absorbable, absorbance, absorbed, absorbency, absorbent, absorbing, absorption
abstain — to give up something for moral reason | related words: abstainer, abstention, abstinence
abstemious — critical
abstinent — not having something for moral reason
abstract — not real; theoretical | related words: abstracted, abstractedly, abstraction, abstractly
abstruse — difficult to understand; obscure
absurd — ridiculous | related words: absurdist, absurdity, absurdly

AGG
Origin: Latin | Meaning: collected
Examples:
agglomerate — to collect things and form them into a mass or group | related word: agglomeration
aggrandize — to increase your importance or power | related word: aggrandizement
aggregate — to put together different items, amounts, etc. into a single total | related words: aggregation, aggregator

ALTR/ALTER
Origin: Latin | Meaning: other
Examples:
altruism — caring about the needs of other people | related word: altruistic
alterable — that can be changed | related word: unalterable
altercation — noisy argument
alternate — to follow one after other | related words: alternately, alternation, alternative

Some More Root Words — A
Root Word [Origin] — Meaning | Example(s) (Related Words in Bracket)
a [Greek] — not | atheism, apolitical, atypical
ablat [Latin] — remove | ablation
ablut [Latin] — wash | ablutions
abort [Latin] — born too soon | abortion
abras [Latin] — rub off | abrasion (abrasive, abrasively, abrasiveness)
abstemi [Latin] — controlled; moderate | abstemious
abund [Latin] — overflow | abundance (abundant, abundantly)
ac [Latin] — to, toward | accept (acceptability, acceptable, acceptably, acceptance, acceptation)
acanth [Greek] — thorn | acanthus
acceler [Latin] — hasten | accelerate (acceleration, accelerator)
acet [Latin] — vinegar | acetate, acetic, acetone
achr [Greek] — colorless | achromic
acm [Greek] — summit | acme
aco [Greek] — relief | aconite
adama [Greek] — invincible | adamant...