Should Semiannual Be Hyphenated?

To remember to use no hyphen and no space in semiannual, just remember that semi is a prefix, and therefore should not be separate from the base word. Also, hyphens between a prefix are only necessary in several situations: between a prefix and proper nouns: un-American.

How do you spell semiannual?

Also semiyearly . occurring, done, or published every half year or twice a year; biannual. lasting for half a year: a semiannual plant.

Is it biannual or semiannual?

Some people prefer to use semiannual to refer to something that occurs twice a year, reserving biannual for things that occur once every two years.