In the spelling lesson, two words have a root that refers to the calendar year. The root, however, is spelled differently in the words. Fill in the missing letter in each blank below.

bi
nn
al

semi
nn
al

1 answer

The two words with a root that refers to the calendar year are "biennial" and "semiannual."

The missing letters to fill in the blanks are:

  1. biennial: the missing letter is "e"
  2. semiannual: the missing letter is "a"

Therefore, the completed words are:

bienneal

semiannual