Verbosity or verboseness is speech or writing that uses more words than necessary (for example, using "Despite the fact that" instead of "Although"). The opposite of verbosity is plain language. Some teachers, including the author of The Elements of Style, warn writers not to be verbose. Similarly, some authors, including Mark Twain and Ernest Hemingway, are known for their avoidance of verbosity.
Synonyms for verbosity include wordiness, verbiage, prolixity, grandiloquence, garrulousness, expatiation, logorrhea, and sesquipedalianism. Slang terms such as verbal diarrhea also refer to the practice.
Examples of verbosity are common in political speech, academic prose, and other genres.
The word verbosity comes from Latin verbosus, "wordy". There are many other English words that also refer to the use of excessive words.
Prolixity comes from Latin prolixus, "extended". Prolixity can also be used to refer to the length of a monologue or speech, especially a formal address such as a lawyer's oral argument.
Grandiloquence is complex speech or writing judged to be pompous or bombastic diction. It is a combination of the Latin words grandis ("great") and loqui ("to speak").
Logorrhea or logorrhoea (from Greek λογόρροια, logorrhoia, "word-flux") is an excessive flow of words. It is often used pejoratively to describe prose that is hard to understand because it is needlessly complicated or uses excessive jargon. The term is also sometimes applied to unnecessarily wordy speech in general.
Sesquipedalianism is a linguistic style that involves the use of long words. Roman poet Horace coined the phrase sesquipedalia verba in his Ars Poetica. It is a compound of sesqui, "one and a half", and pes, "foot", a reference to meter. The earliest recorded usage in English of sesquipedalian is in 1656, and of sesquipedalianism, 1863.