ship images. The Makin Island Raid (occurred on 17 - 18 August 1942) was an attack by the United States Marine Corps on Japanese military forces on Makin Island (now known as Butaritari Island) in the Pacific Ocean.
Biannual is derived from the prefix bi-, which means two, twice, double, doubly, as it comes from the Latin bi-, meaning twice, double, and annual comes from the Old French twelfth century word, annuel, which derives from the Latin annus, year.
Biennial is an adjective which means occurring every two years, or every other year. Also, a biennial plant is one that takes two years to grow from its planting to its death. The adverb form is biennially. Biennial comes from the Latin biennium, which means a two year period. Semiannual means occurring twice a year, the adverb form is semiannually.