The online etymology dictionary (etymonline) is the internet's go-to source for quick and reliable accounts of the origin and history of English words, phrases, and idioms.

english obscure words and etymology resources: online dictionary of weird and unusual words, word lists, technical vocabulary aids, lipograms, and word related essays

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a language arts reference tool and comprehensive search engine for words. includes the functions of a rhyming dictionary, thesaurus, and spelling checker, as well as an integrated full-text search engine for all of shakespeare's works and thousands of quotations and poems.

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acronym finder is the largest and most trusted database of over 4 million acronyms and abbreviations. what does an abbreviation stands for? the answer is here

Theidioms.com website has a large collection of the most common English idioms and sayings. Each idiom comes with several different examples, meanings, and origins.

This is the English translation of a common Chinese expression 马马虎虎