"Voler" means "to fly." And "en" means "in," while the s' is the reflexive.

Yet, "s'envoler" means to fly away, which is different from what I would expect, reading the above. (And google translate gives me "loin" for away, so I would expect that to appear somewhere in the expression.)

How does something like "s'envoler" or "fly in" become "fly away." Could this be a reference to something like "in flight?"