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.
When join two words together with hyphen, we normally get a new compound word, which always signifies a combine meaning of the joined words.
From a Greek word meaning "mark joining two syllables or words."
You can spell reuniting with or without a hyphen. Since the mid 1990's the Oxford English Dictionary has encouraged writing words without hyphens wherever that can be done without obscuring either the meaning or the pronunciation. Reuniting is probably better without a hyphen.
Cross-contamination is acompound modifier which is defined as two words connected by a hyphen, which forms a single adjective. Because when the words stand on their own have different meanings, the hyphen is used to form one word with a single definition. "Cross" can be used as a verb, noun, or as an adjective. Therefore, a hyphen is used in cross-contamination to clarify its meaning.
No, it does not have a hyphen.
It Is A Special Hyphen
A colon is this : and a hyphen is this -
multimedia - NO hyphen
hyphen
No there's not a hyphen.
It does not need to have a hyphen! :)