Richard Lederer's Verbivore
- Linguistic fun from, Richard Lederer, the best-selling author of The Word Circus and the new Sleeping Dogs Don't Lay, a helpful guide for grappling with vexing grammar questions.
- http://www.verbivore.com/

Word Quests for Word Seekers
- Searchable dictionary of word origins, organized in cross-referenced thematic lists by Latin and/or Greek roots. English entries are also defined.
- http://www.wordquests.info

English Language Roots: The Meanings of Word Prefixes, Suffixes and Syllables
- Reference chart for Greek, Latin, and other roots of the English language. Understanding such roots can help guessing the meaning of words and creating neologisms or brand names.
- http://www.prefixsuffix.com

Word Origins and Meanings of Economic Terms
- Click on a word and go right to a brief discussion of its origin.
- http://www.louisville.edu/~bmhawo01/econpage/meanings.html

World Wide Words
- Michael Quinion writes about International English from a British viewpoint. Hundreds of pages on the history, origins, evolution and idiosyncrasies of English, with features on new words and words in the news.
- http://www.worldwidewords.org/

The Phrase Finder
- The meanings and origins of thousands of English phrases and sayings. Also contains a discussion forum to ask a panel questions on the meaning and origin of phrases.
- http://www.phrases.org.uk/

Sayings and Everyday Expressions
- Your online source for the sayings and expressions you use everyday. Search for their meaning, history and origin, find sayings, expressions, phrases, quotations, cliches, unusual words, and wordplay.
- http://users.tinyonline.co.uk/gswithenbank/sayindex.htm

Online Etymology Dictionary
- History and evolution of more than 30,000 words, including slang and technical terms.
- http://www.etymonline.com/

Dave Wilton's Etymology Page
- Devoted to etymology of common words and slang phrases.
- http://www.wordorigins.org/

European Sayings & Idiomatic Expressions
- Dedicated to gathering sayings and idioms and their translation/explanation from all over Europe. User contributions welcome.
- http://sayings.jacomac.de/

Businessballs.com - Etymology of Clichés, Expressions and Words Etymology
- English language terms and expressions.
- http://www.businessballs.com/clichesorigins.htm

Word Sources
- Includes a searchable database of Latin and Greek roots and affixes, a free newsletter, and links to other sites.
- http://www.wordsources.info/

A Comparative Dictionary of Indo-Aryan Languages
- Online version of the indexes of R.L. Turner's 1962-1985 dictionary from the Digital Dictionaries of South Asia.
- http://dsal.uchicago.edu/dictionaries/soas/

Altaic Etymology
- Online database version of the Altaic Etymological Dictionary by S. Starostin, A. Dybo and O. Mudrak.
- http://starling.rinet.ru/cgi-bin/startq.cgi?flags=eygtnnl&root=config&basename=%5Cdata%5Calt%5Caltet

Word Spy
- Collection of recently coined words, existing words that have enjoyed a recent renaissance, and older words that are now being used in new ways.
- http://www.wordspy.com/

Exploring English Words
- Exploring English words that are derived from Latin and Greek sources with etymologies and vocabulary activities.
- http://www.wordexplorations.info

Words with Heathen Origins in the Scriptures
- An etymological study of numerous words used in churches and Scriptures that have their origin in pagan religions.
- http://www.innvista.com/culture/religion/bible/compare/heathen.htm

Word and Phrase Origins
- Directory. Part of the Internet Public Library. Describes books and web sites that might be helpful. Offers a hint on how to use an ordinary search engine when looking for etymology.
- http://www.ipl.org/div/pf/entry/48468

Etymologic
- The brain-twisting etymology game.
- http://www.etymologic.com/

American Dialect Society
- A scholarly association dedicated to the study of the English language in North America.
- http://www.americandialect.org/

Pandora's Word Box
- Relates medical terminology to the humanities, offering a weekly overview with references to classical etymology.
- http://pandorawordbox.com/

Word Origins
- This regularly updated page, provided by The Writer's Place, focuses on a word and its spelling, pronunciation, and derivation.
- http://www.thewritersplace.com/writestuff/origins.htm

Roots of English
- An etymological dictionary you can download by Prof. Eugene Cotter, Seton Hall University.
- http://ablemedia.com/ctcweb/showcase/roots.html

New York State Facts
- The origins of New York State's county names.
- http://www.dos.state.ny.us/kidsroom/nysfacts/counties.html

Oxford English Dictionary
- Presents a word a day complete with pronunciation, spellings, etymology, quotations and date chart.
- http://oed.com/cgi/display/wotd

New Words In English
- Neologisms and novel uses of words in English collected by members of the class Linguistics/English 215, Words in English: Structure, History and Use, taught by Suzanne Kemmer at Rice University.
- http://www.owlnet.rice.edu/~ling215/NewWords/index.html

Nautical Expressions in the Vernacular
- Myriad expressions in everyday English have nautical origins. This web page lists expressions and definitions mentioned by listswains, members of the Patrick O'Brian Mailing List, also known as the Gunroom.
- http://www.io.com/gibbonsb/words.words.words.html

Etymologically Speaking
- A list of some curious word origins.
- http://www.westegg.com/etymology/

What's The Meaning of This?
- The origins of quirky English words and phrases like "In like Flynn" and "blackmail."
- http://www.rootsweb.com/~genepool/meanings.htm

Focusing on Words
- An advanced Latin-Greek-English vocabulary source of etymologies with thematic units of roots, prefixes, and suffixes, and vocabulary quizzes.
- http://www.wordfocus.com/

MooT
- The game of grammar, semantics, and etymology. Play online the game that investigates the history and meaning of English words.
- http://www.mootgame.com/

The Word Detective
- Words and language in a humorous vein. The online version of The Word Detective, a newspaper column answering readers' questions about words and language. Written by Evan Morris.
- http://www.word-detective.com/

Take Our Word for It
- Weekly etymology magazine.
- http://www.takeourword.com/