I am trying to figure out the difference between vorgehen and vorangehen.
From the perspective of word-formation, both denote the sense of "to move forward".
From Langenscheidt Großwörterbuch, vorgehen means
(of people) take steps forward/take measures
and vorangehen means
(von Sache) progress
I am wondering whether this difference in word meaning and usage may be traced back to the difference between the difference between the two prefixes vor- and voran-? If the answer be yes, how to interpret voran- in terms of the combination of vor- and an-?
(the following content is a later addition to the original post)
I risk this wild guess that voran|gehen means moving in an expected direction; the notion in an anticipatory direction may be what an denotes and what is absent from vorgehen.
Would any one agree or disagree with my guess?