English Word Formation: How New Words Are Created

English keeps expanding because its speakers have many ways to make, reshape, and adopt words. A new term might come from a prefix, a borrowed foreign word, a shortened form, a brand name, or a playful mash-up that catches on.

The size of the English vocabulary depends on what is being counted, with estimates running from about 170,000 words to well over a million. However you count them, the source is not mysterious: English relies on a set of familiar word formation processes. This guide walks through the major ones, including derivation, compounding, blending, clipping, acronyms, back-formation, conversion, borrowing, and a few smaller patterns.

Ways English Builds New Vocabulary

English grows through several repeatable methods. Derivation and compounding are old, steady engines of word creation. Blends and acronyms, while not new, are especially visible in modern technology, media, and slang. Learning these patterns strengthens your grasp of etymology and can help you make sense of words you have never seen before.

Creating Words with Affixes

Derivation is one of the busiest word-making systems in English. It forms new words by attaching prefixes or suffixes to a base word or root. For a broader list of useful affixes, visit our guide to word roots, prefixes, and suffixes.

Word Beginnings: Prefixes

Prefixes go before a base word. In many cases, they adjust the meaning while leaving the word’s part of speech unchanged:

Word Endings: Suffixes

Suffixes attach to the end of a base word. They often turn the word into a different part of speech:

Putting Existing Words Together

Compounding forms a new word by joining two or more words that already exist. The new compound word may be fairly transparent, or its meaning may stretch beyond the literal meanings of the parts.

• Adjective + Adjective: bittersweet, red-hot, well-known
• Noun + Verb: sunshine, rainfall, nightfall, nosebleed
• Verb + Noun: breakfast (break + fast), pickpocket, scarecrow, driveway
• Adjective + Noun: blackbird, greenhouse, highway, smartphone
• Noun + Noun: bookshelf, football, toothpaste, website, sunflower

Compounds appear in three common spellings: closed as one word (notebook), hyphenated (mother-in-law), or open as separate words (ice cream). For more on those patterns, see our compound words guide.

Merging Word Parts

Blending, often called portmanteau formation, makes a word from pieces of two existing words. Usually, the beginning of one word is combined with the ending of another. Lewis Carroll used the term "portmanteau" in Through the Looking-Glass. We cover this pattern in more detail in our guide to portmanteau words.

• glamping = glamorous + camping
• hangry = hungry + angry
• staycation = stay + vacation
• infotainment = information + entertainment
• Bollywood = Bombay + Hollywood
• podcast = iPod + broadcast
• email = electronic + mail
• blog = web + log
• smog = smoke + fog
• brunch = breakfast + lunch

Blends work well when people need short, memorable names, so they show up often in advertising, technology, entertainment, and casual speech.

Shortening Longer Words

Clipping, also known as truncation or shortening, produces a shorter word by removing one or more syllables from a longer one. The new form usually keeps the same basic meaning, though it often sounds more casual.

Main Shortening Patterns

• Complex clipping (shortening a compound or phrase): situation comedy → sitcom, public house → pub
• Middle clipping (keeping the middle portion): influenza → flu, refrigerator → fridge
• Front clipping (removing the beginning): airplane → plane, omnibus → bus, hamburger → burger, telephone → phone
• Back clipping (removing the ending, the most common type): advertisement → ad, laboratory → lab, examination → exam, photograph → photo, influenza → flu

Letter-Based Words and Abbreviations

Acronyms are made from the first letters of a longer phrase and pronounced as words. Examples include NASA (National Aeronautics and Space Administration), scuba (self-contained underwater breathing apparatus), and laser (light amplification by stimulated emission of radiation).

Initialisms also use first letters, but speakers say the letters one by one. FBI, HTML, CEO, ATM, and USA are common examples.

Some acronyms become so ordinary that their origins fade from everyday awareness. "Radar" comes from radio detection and ranging, "sonar" from sound navigation and ranging, and "scuba" began as an acronym before becoming a normal-looking word.

Online and digital communication have made this pattern highly visible. LOL, FOMO, YOLO, FAQ, and URL all come from the same basic habit of building compact forms from initials.

Working Backward from Longer Forms

Back-formation creates a word by taking away a real or assumed affix from an existing word. It works like derivation in reverse: instead of adding an ending, speakers remove something that looks like one.

• diagnose ← diagnosis
• self-destruct ← self-destruction
• swindle ← swindler
• enthuse ← enthusiasm
• babysit ← babysitter
• donate ← donation
• televise ← television
• edit ← editor (the noun "editor" existed before the verb "edit," though it looks as if it should come from a verb plus "-or")

Back-formation shows how speakers interpret word structure. When a word such as "editor" looks like an agent noun, people may infer a matching verb, even when the historical order went the other way.

Changing Word Class Without Changing Form

Conversion, also called zero derivation or functional shift, changes a word’s part of speech without adding or removing anything. The spelling stays the same, but the grammatical job changes.

• Adjective → Noun: "the young," "the brave," "the elderly," "finals"
• Adjective → Verb: "to empty" (from the adjective), "to dry" (from the adjective "dry"), "to clean" (from the adjective "clean")
• Verb → Noun: "a walk" (from "to walk"), "a call" (from "to call"), "a drive" (from "to drive")
• Noun → Verb: "to text" (from the noun "text"), "to email" (from the noun "email"), "to bookmark" (from the noun), "to Google" (from the brand name)

English uses conversion very freely compared with many other languages. That flexibility helps explain why English can absorb new uses quickly and expand its vocabulary with little formal change.

Taking Words from Other Languages

Borrowing, or the use of loanwords, brings vocabulary from other languages into English. Across its history, English has taken in words from hundreds of sources.

• From Arabic: algebra, algorithm, cotton, zero — see Arabic words in English
• From Japanese: tsunami, karate, emoji, sushi — see Japanese words in English
• From Latin: alumni, status, agenda, versus — see Latin words in English
• From French: restaurant, ballet, café, bureau — see French words in English

Additional Ways New Words Appear

New Coinages and Neologisms

This process creates a word as a new form rather than by using a familiar affix or compound pattern. Completely fresh coinages are uncommon; many begin as product or brand names, such as aspirin, nylon, zipper, Xerox, and Kleenex. Technology has also produced terms such as blog, vlog, and meme.

Name-Based Words

Eponyms are words that come from people’s names. Examples include sandwich (Earl of Sandwich), boycott (Captain Charles Boycott), and algorithm (al-Khwarizmi). See our guide to words from people's names.

Sound-Imitating Words

Onomatopoeia forms words that echo sounds, such as buzz, hiss, splash, click, meow, and tick-tock. See more examples in onomatopoeia words.

Repeated and Echoed Forms

Reduplication repeats a whole word or part of a word, sometimes with a vowel shift. Common examples include tick-tock, flip-flop, mishmash, zigzag, ping-pong, chit-chat, and riffraff.

Word formation shows English in motion. Speakers shorten words, borrow them, combine them, shift their grammar, and build new forms from old ones. Once you recognize these patterns, unfamiliar vocabulary becomes easier to analyze, and the growth of English feels less random.