improbably
1. [ adverb ] not easy to believe
Synonyms: incredibly unbelievably implausibly
Examples:

"behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains"

Related terms: believably credibly incredible incredible improbable implausible incredible
Similar spelling:   improbable
  improbability
  impregnably
  improvable
  improperly
  impregnable