Seperately (i.e "one way")
One word (i.e. "hairsplitter")
Connected with a hyphen (i.e. "well-known")
None of the above
Hyphenate modifiers that precede a noun and when they follow a noun.
Hyphenate modifiers that precede a noun and not when they follow a noun.
Hyphenate modifiers that don't precede noun.
Hyphenate all modifiers.
It doesn't make a difference.
Re-press means to physically press again something whereas repress signifies to repress a memory.
High altitude balloon.