The words that represent verbs that would be
useful in describing the purpose for a text are
the following ones: Inform and define.
Cambridge dictionary defines the verbs "to
inform" as "to tell someone about particular
facts" and "to define" as "to say what the
meaning of something is". When you are about
to describe the purpose of a text, you are to
inform the reader what you want to say and why
you are saying it. You are giving meaning to
your piece of writing.
