'merry-go-round', ugly-looking, un-american and things similar to that :3
Here is an example of using a hyphen correctly: Justin was purpose-driven by his motivation to finish well.
No hyphen is needed for world class. World is just an adjective that describes class much like (for example) upper class, which also does not need a hyphen.
No, the correct spelling is extracurricular. Adding extra does not require a hyphen. For example, extraterrestrial is extra+terrestrial (no hyphen needed).
I'm a pre-med student at school.
a hyphen EXAmPLE: golden - ball
No. Just looked it up in a printed dictionary. In fact, no work with the 'multi' prefix uses a hyphen. For example, multilateral
Yes, you need a hyphen in "professional-quality" when it is used as a compound adjective before a noun. The hyphen clarifies that "professional" modifies "quality" and together they describe the noun that follows. For example, in "professional-quality equipment," the hyphen helps convey that the equipment meets a certain standard.
lifetime is just one word and you don't use a hyphen. (example): Hopefully my parents won't die during my lifetime.
The term "community-wide" does require a hyphen when used as a compound adjective before a noun. For example, you would say "a community-wide event." However, if it follows the noun, you would write it without the hyphen, as in "the event was community wide."
Yes, "younger-looking" should have a hyphen when used as a compound adjective before a noun. The hyphen clarifies that "younger" modifies "looking" as a single idea describing the noun that follows. For example, you would write "She has a younger-looking appearance."
A hyphen is not typically used in the word "prerequisite" itself, as it is a single, unhyphenated term. However, hyphens may be used when "prerequisite" is part of a compound adjective. For example, in the phrase "prerequisite course," no hyphen is needed, but if you were to modify it in a sentence like "This is a prerequisite-required course," a hyphen is used to connect the two words for clarity.
You say "A hyphen" because the sound of the letter "H" at the beginning of the word "hyphen" is pronounced, making it a consonant sound.