The letter "M" can refer to many different things depending on the context. Some common meanings include:
A hyphen ( - ) is used to link parts of a compound word. This includes most dual heritages (Mexican-American), and all words in a compound modifier except "very" and adverbs that end in "ly." (The Broncos scored a first-quarter touchdown.)
The Dash. An em dash—inserted by typing Control+Alt+Minus between the words it separates—signals an abrupt break in thought. It can be seen as “surprising” the reader with information. If used judiciously it can mark a longer, more dramatic pause and provide more emphasis than a comma can.
Hyphens (-)
A hyphen (-) is short and joins words (e.g., self-esteem, well-behaved), while a dash is longer and separates ideas, with two main types: the en dash (–) for ranges (e.g., pages 10–15) and the longer em dash (—) for emphasis or parenthetical breaks (e.g., The plan—the first of its kind—was introduced). Hyphens are for word construction; dashes are for sentence structure and emphasis, and you'll often use two hyphens (--), which word processors can auto-correct to an em dash, as a substitute.
A dash of history
Although medieval scribes used long strokes to indicate pauses or breaks in thought, the em dash emerged as a standard during the 15th-century printing revolution. And they became popularized by authors like Laurence Sterne and Emily Dickinson in the 18th and 19th centuries.
An em dash can also be used to mark a break in a sentence in place of a semicolon or colon. In this context, dashes are often used for emphasis or to signal a change in tone: There was no arguing with her—she was set in her opinion.
The Hyphen
You can use the em dash to do all of the following:
Once used as the equivalent of the modern period and comma, the slash is now used to represent division and fractions, as a date separator, in between multiple alternative or related terms, and to indicate abbreviation.
10 Types of Hyphenation Errors
In English, it is normally read aloud as "at", and is also commonly called the at symbol, commercial at (commat), or address sign.
A hyphen is a punctuation mark that looks like a dash (-) and is used to link two or more words together. It can also be used to indicate a pause, to spell out fractions and numbers, and to divide long words into two parts. Hyphens are also referred to as "hyphens" or "dashes."
A three-em dash, ———, indicates that a word has been left out or that an unknown word or figure is to be supplied.
A is used before a noun that starts with a consonant sound (e.g., “s,” “t,” “v”). An is used before a noun that starts with a vowel sound (e.g., “a,” “o,” “i”).
There are four types of sentences in English: declarative, interrogative, imperative, and exclamatory.
Common Errors in English: A, AN, THE
Often, phrasal verbs have noun and/or adjective forms that are compounds, and many of those forms are hyphenated (or closed). Take care not to add a hyphen to a phrasal verb because its corresponding compound noun or adjective has one—this is a common error.
Note that, unlike the words early, late, north, south, etc., the prefix mid- always requires a hyphen (except where it forms part of a single word, as in midnight):
In writing, we use three different types of dashes: the hyphen, the en dash, and the em dash. This may come as a surprise to many as the hyphen tends to dominate the spotlight. After all, the hyphen is the only dash that makes it onto most keyboards. Considering that the pipe symbol—the what?
An em dash derives its name from being the approximate width of a capital M. It can function like a comma, parenthesis, or colon. Like commas and parentheses, em dashes often set off descriptive or parenthetical information.
The 14 core punctuation marks in English, crucial for clarity and tone, include the period (.), question mark (?), exclamation point (!), comma (,), colon (:), semicolon (;), apostrophe ('), quotation marks (""), ellipsis (...), hyphen (-), dash (—), parentheses (()), brackets ([]), and braces ({}). These symbols guide readers by indicating pauses, emphasis, sentence structure, and groupings of words, making writing more readable and professional.
How to Use dash in a Sentence