100 Words Almost Everyone Confuses and Misuses HOW TO USE THE DICTIONARY To look up an entry in The American Heritage Dictionary of the English Language, use the search window above. For best results, after typing in the word, click on the “Search” button instead of using the “enter” key. Some compound words (like bus rapid transit, dog whistle, or identity theft) don’t appear on the drop-down list when you type them in the search bar. For best results with compound words, place a quotation mark before the compound word in the search window. guide to the dictionary THE USAGE PANEL The Usage Panel is a group of nearly 200 prominent scholars, creative writers, journalists, diplomats, and others in occupations requiring mastery of language. Annual surveys have gauged the acceptability of particular usages and grammatical constructions. The Panelists NEED HELP SOLVING A CROSSWORD PUZZLE? Go to our Crossword Puzzle Solver and type in the letters that you know, and the Solver will produce a list of possible solutions. -- AMERICAN HERITAGE DICTIONARY APP The new American Heritage Dictionary app is now available for iOS and Android. THE AMERICAN HERITAGE DICTIONARY BLOG The articles in our blog examine new words, revised definitions, interesting images from the fifth edition, discussions of usage, and more. OPEN DICTIONARY PROJECT Share your ideas for new words and new meanings of old words! Start Sharing Now! -- See word lists from the best-selling 100 Words Series! Find out more! INTERESTED IN DICTIONARIES? Check out the Dictionary Society of North America at http://www.dictionarysociety.com As an autumn chill creeps into the air, students and teachers are gearing up for another school year. The must-have resource to keep kids, and adults, at the top of their class is 100 Words Almost Everyone Confuses and Misuses, the latest in the very successful 100 Words series. Anxiety about education and student performance are at the top of everyone's agenda — from politicians to parents — and this volume addresses those concerns seriously but with a playful approach. Knowing the subtle but important differences between words can make for more effective (not affective) and eloquent communication. The following is the entire list of words almost everyone confuses and misuses: adverse / averse affect / effect aggravate alleged all right altogether among / between assure / ensure / insure auger / augur average / median blatant / flagrant capital / capitol complement / compliment comprise consul / council / counsel convince / persuade discreet / discrete disinterested / uninterested enervate enormity / enormousness factoid fewer / less flammable / inflammable flaunt / flout forte gender / sex hopefully impact impeach imply / infer incredible / incredulous irony irregardless its / it's kudos lay / lie leave / let literally mass / weight mean mischievous nuclear parameter penultimate peruse phenomenon plus precipitate / precipitous prescribe / proscribe presently principal / principle renown reticent sacrilegious seasonable / seasonal sensual / sensuous set / sit that / which unexceptionable / unexceptional unique utilize / use wherefore wreak / wreck zoology Indo-European & Semitic Roots Appendices Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices: Indo-European Roots Semitic Roots The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots. 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