I don't want to discourage you, but the test is rather difficult.

The prefix of the italicized word in the sentence above is
not

No.

i meant bi the meaning is two

bi = two (yes)

However, there is no word beginning with bi- in the sentence you posted here.

sorry i post that on da wrong one but the sentence about the word is discourage the prefix is dis=not

To determine the prefix of a word, you need to identify the group of letters at the beginning of the word that changes its meaning. In this case, the italicized word is "not". The prefix is the group of letters "not" as it comes before the root word.