bimonthly
Bimonthly means every two weeks. One can tell by the word monthly which is included in the word bimonthly, giving this clear indication of what is intended.
From the Related Link below: ; bimonthly / semimonthly : Bimonthly is an adjective that means every two months: "I brought the cake for the bimonthly office party." Bimonthlyis also a noun that means a publication issued every two months: "The company publishes several popular bimonthlies." Semimonthly is an adjective that means happening twice a month: "We have semimonthly meetings on the 1st and the 15th."
A bimonthly magazine is published every two months.
The word Biennial means Every two years
The BI word that means twice every year is "biannual." It refers to events or occurrences that happen two times within a year, typically spaced six months apart. It's important not to confuse it with "biennial," which refers to something that happens every two years.
Biannual~ this means twice in one yearbiennial~ this means once every two years
According to the online Oxford Dictionaries, "bimonthly" can refer to something occurring every two months or twice in one month. It might be best to just say "every two months" to avoid confusion.
biennial
The word is... bicentennial.
Biannual biannual means twice per year. Biennial means every two years or every other year.
The prefix bi- usually means 'every two', so bimonthly means 'every two months'. Semi- means 'half' or 'halfway', so semimonthly means 'every two weeks'. However, bimonthly can also mean 'twice a month' - but it is rarely used that way. It is best to remember that bi- is "every two" and semi- is "halfway."
The base word for biweekly is week. The prefix is bi and the suffix is ly. With the prefix and suffix added the base word, it means twice a week or every two weeks, since bi means two.