What does the prefix prepare mean?
To begin with, the third person singular ,present tense of the
verb "to do", is "does".
This is how it goes: I do, he/she/it does, we do, you do, they
do.
Secondly, "prepare" is not a prefix, but a verb- i.e. a word
which indicates that something is being done."To prepare" is the
infinitive of the verb.