Use a hyphen when a prefix ends with a vowel and the word following it begins with the same vowel.
Exceptions: cooperate, coordinate
Generally, do not hyphenate a word that begins with a consonant.
See hyphens
Use a hyphen when a prefix ends with a vowel and the word following it begins with the same vowel.
Exceptions: cooperate, coordinate
Generally, do not hyphenate a word that begins with a consonant.
See hyphens