Prefixes Suffixes & Root Words

Prefixes Suffixes & Root Words teaches you how English words are built, so you can grow your English vocabulary fast: 97 prefixes, 43 suffix entries, 128 Latin roots and 53 Greek roots, with example words and simple meanings.
Learn the word parts once, and you can understand, remember and spell thousands of English words. 34 lessons in 7 sections, 85 practice questions with answers, and it all works offline.

Most long English words are made of smaller parts: a prefix at the front, a root word in the middle and a suffix at the end. Every entry gives a short meaning, its origin (Old English, Latin, Greek or French) and example words with simple definitions.

What you will learn

• How Words Are Built: prefix, root and suffix, free and bound parts, where affixes come from, assimilation (in- becomes im-, il-, ir-), and a step-by-step method to break down a long word
• Prefixes grouped by meaning: negative prefixes (un-, in-, non-, dis-, a-), number and amount prefixes (uni-, bi-, tri-, multi-, poly-), time and order prefixes (pre-, post-, re-), place and direction prefixes (sub-, super-, inter-, trans-), size and degree prefixes, plus an A–Z list of all 97 prefixes
• Latin Roots A–Z: 128 Latin roots, from ag/act to vor, each with its Latin source word, example words and one word explained
• Greek Roots: 53 Greek roots and 20 Greek endings used in science, such as -logy, -meter, -phobia and -itis
• Suffixes: noun suffixes, verb and adverb suffixes, and adjective suffixes, with their meanings and origins
• Grammar endings and spelling: -s, -ed, -ing, -er, -est, and the spelling rules for adding suffixes: silent e, y to i, doubling consonants, -able or -ible
• Word Families and Tips: word families drawn as trees, one root in four word classes, guessing meanings from word parts, and traps such as false prefixes and popular word myths
• Practice: build words, break words down, match the meanings, spell with suffixes and change the word class

Features
• 97 English prefixes, 43 suffix entries, 128 Latin roots, 53 Greek roots and 20 science endings
• Example words for every prefix, suffix and root word, each with a simple definition
• Diagrams of word parts and word family trees
• 85 practice questions with tap-to-reveal answers
• Search all lessons from the home screen, and filter boxes on the long lists of prefixes, suffixes and roots
• Dark mode
• Works offline, no account needed
• Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia (the explanations are translated; the English words stay in English)

Who it is for
• Students learning English as a second or foreign language who want to build English vocabulary faster
• School and university students studying prefixes and suffixes, root words and word formation
• Anyone preparing for vocabulary sections of English tests such as the SAT, GRE, TOEFL or IELTS
• Readers who want to read faster, guess new words and spell better

Prefixes Suffixes & Root Words is an independent study aid. Meanings and origins were checked against standard dictionaries and etymology references. It is not affiliated with any dictionary publisher, examination board or test maker.

Recent changes:
Completely rewritten: learn how English words are built — about 100 prefixes, 180 Latin and Greek roots and 40 suffixes with meanings, origins and examples, spelling rules, word families, tips for guessing meanings and practice questions. Explanations now in 8 languages.