This is a hyphen : –
This is an en dash: –
This is an em dash: —

HYPHEN

To begin with, in your native language (other than English) you can perhaps insert a hyphen when a word has to be split up at the end of a line. This is very unusual in English texts. And nowadays it is unusual in any text written on a computer, since the line breaks are inserted automatically. Even when a text is right-justified (the text is aligned with the right margin), the word processor adjusts the line length by changing the spaces between words. So we need not worry about this use of the hyphen.

A much more common use of the hyphen is in compounds, inside words or word combinations. Re-establish is a word made up of the prefix re and the verb establish. It means establish again.

We use a hyphen in compounds such as self-esteem, fifty-six, far-reaching, blue-green, sister-in-law and state-of-the-art. However, there are many compounds in English that are written without a hyphen—financial manager, production plan, information technology, etc. And many compounds are written in one word—airport, football, input, headache, etc. You can read more about compounds here.

THE EN DASH

An en dash has its name from the fact that it is as wide as the letter N. Consequently, the longer dash is called em dash.

The en dash (–) is used to indicate a range of, for example, dates, years or pages in a book:

You can find his most famous speech on pages 149–153.
Barack Obama was President of the USA 2009–2017.
The conference was held 31 August–2 September.

The en dash can also indicate a relation or connection:

His research focuses on human–robot collaboration.
They usually took the Paris–Brussels train.
They had a close mother–daughter relationship.

Notice that you cannot use a dash if you write between or from. It is wrong to write *between 2009–2017 or *from 149–153. (For the use of the asterisk here see the note at the end of this page.)

Obama’s presidency was between 2009 and 2017.
The speech is printed on the pages from 149 to 153. 

THE EM DASH

The em dash (—) is longer than a hyphen or an en dash. The em dash indicates a break or an insert in a sentence. It can be used in pairs like brackets or alone to separate the end of a sentence from the main part.

Most of their garden products—lawn mowers, grass trimmers, hedge trimmers and leaf blowers—were on sale in October.
His fame had spread far and wide—he had shown that he was a very talented footballer—and he could now sign a new and better contract.
I had better put on winter tyres right away—there’ll be snow any day now.

There are no spaces before and after a hyphen, an en dash or an em dash.

However, some British style guides recommend to use an en dash with spaces before and after it instead of an em dash. If you write for a journal, make sure to consult its guide for authors.

In my next blog entry I will show you where to find dashes on a computer keyboard.

The post A hyphen is not the same as a dash appeared first on copyeditor.se.

When the compound is a modifier, especially when it modifies a noun, we use a hyphen:
This is a well-written article.

But there is no hyphen in the following sentence:
I think the article is well written.

Here are some more examples:

They are five-year-old children. (Notice that there is no plural -s).
The children are five years old.

He is a part-time mechanic.
He works part time.

This is a long-term project.
We must plan for the long term.

The hyphen often helps to clarify what the writer wants to say.

He is selling his little-used bike means that the bike has not been used much.
He is selling his little used bike would mean that the bike is little (small) and has been used.

Do you understand the difference between a single family home and a single-family home?
And between a small business owner and a small-business owner?
Or an old furniture salesman and an old-furniture salesman?

We can leave out the hyphen if there is no risk for confusion:

I found a used car dealer.

An adverb ending in -ly is not followed by a hyphen:

A smartly dressed woman

The post An old furniture salesman or an old-furniture salesman? appeared first on copyeditor.se.

A compound can be a combination of a noun and a noun (school nurse), an adjective and a noun (full moon), an adverb and a verb (far-reaching), a verb and an adverb (check-up), a preposition and a noun (underworld), a preposition and a verb (overestimate), an adjective and another adjective (blue-green) – and a few more combinations.

In English there are three ways to write compound words: as separate words (open compounds), as one word (closed compounds) or as words combined with a hyphen (hyphenated compounds). This can sometimes be rather confusing. We write head office as separate words, we write head-teacher with a hyphen and we write headmaster as one word. Likewise we have table knife but tablespoon.

This may seem frustrating, and if you are in doubt, you had better check a dictionary or a style sheet. (Actually, you can also write stylesheet. Some compounds can take any of the three forms. You can write life style, life-style or lifestyle.)

OPEN COMPOUNDS

Unlike some other languages – German, Swedish or Finnish, for example – English often does not combine the separate words into one word. A breakfast table is in German Frühstückstisch; a hotel room is in Swedish hotellrum; a taxi driver is in Finnish taksinkuljettaja.

Here are some examples of open compounds in English:

CLOSED COMPOUNDS

The following are examples of compounds written in one word:

Compounds with words from Latin or Greek are written as one word:

photography
agriculture

HYPHENATED COMPOUNDS

Many compounds – especially those formed by two nouns – used to be hyphenated, but now most of them are written either as one word or two separate words. Here are some compounds that are still hyphenated (and you will notice that they are generally not of the noun+noun type):

Compounds with three or more words are usually written with hyphens:

Compound numbers from twenty-one to ninety-nine are hyphenated:

My dad is forty-two.

Fractions also take a hyphen:

We had already driven two-thirds of the way.
Less than one-fifth of the operators are women.

But with a instead of one there is no hyphen:

Less than a fifth of the operators are women.

Some compounds have changed from being hyphenated to a single word. We used to write on-line and world-wide, but nowadays online and worldwide are more common. This also applies to words such as cooperate and proactive.

To avoid confusion, a hyphen is used when the prefix ends and the base word begins with the same vowel:

anti-intellectual

COMPUNDS AS MODIFIERS

When compounds are used as modifiers, they are written with a hyphen. A modifier works as an adjective or adverb to add information about the word directly following it.

A six-year-old boy.
But: The boy was six years old.

We rely on just-in-time delivery.
But: I arrived just in time. The clock struck three when I opened the door.

You can read about compounds as modifiers here.

And here you can read about how to write e-mail (or email).

The post Compounds in English appeared first on copyeditor.se.

The prefix co (and its alternative forms con, com, col and cor, depending on which letter follows the prefix) has the meaning with, together with.

A prefix is usually not followed by a hyphen. Some examples:
Afterthought, antedate, biannual, collaborate, commemorate, confederation, displace, ensure, illegal, indirect, overuse, posttraumatic, prepaid, replace, submarine, underestimate, uninterested.

So you are right in leaving out the hyphen in words such as cooperate, collaborate and coordinate.

However, in some cases a hyphen is to prefer, since otherwise the spelling might suggest a different pronunciation:

If you write co-opt without a hyphen (coopt), it looks as if it could be pronounced with a vowel as in too, and re-edit, when written reedit might sound like read it. The same pronunciation issue would apply to, for example, re-enter, re-establish, and re-examine.

Some words with the prefix re- have two versions, one with and one without a hyphen:

When you re-sign a document, you sign it again, but when you resign, you quit a job.
To re-cover means to cover again, while recover is to get better, regain your health.
When you re-store goods, you put them back in store again, but to restore something means to reconstruct or bring back to a former state.

You can read more about re here.

And, since we are dealing with English, we have to accept inconsistencies like the following:

Anti-clockwise, anti-hero and anti-Semitism but antirust, antiseptic and antisocial.
Vice President of a state; vice president or vice-president in business.
Viceroy but vice-chancellor.

A last note: Instead of writing cooperate, you could consider writing collaborate. There is a difference between the two!

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