Final answer:
Adding the prefix bi- to a root word changes its entire meaning.
Step-by-step explanation:
Adding the prefix bi- to a root word changes its entire meaning. The prefix bi- means two or twice, and it often indicates that there are two of something or that something is happening in two ways. For example, adding bi- to the root word cycle creates the word bicycle, which means a vehicle with two wheels. So, the prefix bi- changes the meaning of the root word by indicating the presence of two or doubling something.
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