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Pleonasm is the use of more words than necessary to express an idea. The word comes originally from Greek πλεονασμος pleonasmos (="excess").

1 Pleonasm usage

Pleonasm can be used in different ways. Sometimes use of excessive words is deprecated, but pleonasm can also be simply an unremarkable use of idiom or even aid in achieving a particular linguistic effect, be it social, poetic, or literary.

While a word is pleonastic if it isn't necessary to denote mere sense, pleonasms can serve purposes external to meaning. A speaker who is overly terse is often interpreted as lacking ease or grace. In spoken language, sentences are spontaneously created without the benefit of going back and editing. This restriction in the ability to plan often creates much redundancy. In written language, sometimes removing words that aren't necessary for mere sense can make writing seem stilted or awkward, especially when words are cut from an idiomatic expression, leading the reader to wonder why the normal idiom wasn't used.

Some pleonastic phrases are part of a language's idiom, like "safe haven" and "tuna fish" in English. They are so common that their use is unremarkable, although in many cases the redundancy can be dropped with no loss in meaning. Phrases like "off of" are common in spoken or informal written English, but "keep the cat off the couch" is also unremarkable to most. In a satellite-framed language like English, verb phrases containing particles that denote direction of motion are so frequent that even when such a particle is pleonastic, it seems natural to include it.

On the other hand, as is the case with any literary or rhetorical effect, excessive use of pleonasm can weaken writing or speech. Too many words can distract from the content. Those who aim to deceive often couch their language in excessive verbiage to hide their true intent. William Strunk Jr. argued for concision in The Elements of Style, (1918):

Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts. This requires not that the writer make all his sentences short, or that he avoid all detail and treat his subjects only in outline, but that every word tell.

There are two kinds of pleonasm: syntactic pleonasm and semantic pleonasm.

2 Syntactic pleonasm

Syntactic pleonasm occurs when a language's grammar makes certain function words optional. For example, consider the following English sentences:
  1. I know you are coming.
  2. I know that you are coming.

In this construction, the conjunction that is optional when joining a sentence to a verb phrase with know. Both sentences are grammatically correct, but the word that is considered pleonastic in this case.

3 Semantic pleonasm

Semantic pleonasm is more a question of style and usage than grammar. Linguists usually call this redundancy to avoid confusion with syntactic pleonasm, a more important phenomenon for theoretical linguisticsBroadly conceived, linguistics is the study of human language, and a linguist is someone who engages in this study. The study of linguistics can be thought of along three major axes, the endpoints of which are described below: Synchronic and diachronic Sy. It can take various forms, including:

We watched the bear climb up the tree.
Receive a free gift with every purchase.
I ate a tuna fish sandwich.
You should get the climbers off of the mountain.
Sometimes it's hard to face up to facts.
He feared he would lose out on the benefits.

See List of redundant expressionsIntroduction This is a list of common redundant expressions, phrases which implicitly repeat an idea or use words which add nothing to the meaning, and sentences in which they might be used, organized alphabetically by phrase. NOTE Some phrases may not be for more examples.

An expression like "tuna fish", however, will elicit one of three mental responses:

  1. It will simply be accepted as synonymous with "tuna".
  2. It will imply a nonexistent distinction. A reader of "tuna fish" could properly wonder: Is there a kind of tuna which isn't a fish? (There is, after all, a dolphin mammal and a dolphin fish.)
  3. A variant of 2), it will evoke an astutely critical "As opposed to what, tuna birds?" type of reaction.

The last two are good reasons for careful speakers and writers to be aware of pleonasms.

In contrast to redundancy, an oxymoronAn oxymoron (plural "oxymorons" or "oxymora") is a short phrase that appears self-contradictory. Oxymoron is a Greek term which can be translated literally as "sharp-witted absurdity". The oxymorons are a proper subset of the expressions called contradict results when two seemingly contradictory words are adjoined.



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