frighteningly
1. [ adverb ] in an alarming manner
Synonyms: scarily
Examples:

"the disturbing thing about the Minister's behavior is that far from being artificial, it too often rings frighteningly true"

Related terms: awful chilling awful chilling
Similar spelling:   frightening
  frighten_away
  frightened
  frightfully
  frighten_off
  freight_rate
  freight_agent
  freightage
  freight_train