Word Study
frighten |
frighten away |
frighten off |
frightened |
frightening |
frighteningly
| frightful
| frightfully
| frightfulness
| frightless
| frightment
frighteningly
WORDNET DICTIONARY
Adverbial frighteningly has 1 sense
- frighteningly(r = adv.all) scarily - in an alarming manner; "the disturbing thing about the Minister's behavior is that far from being artificial, it too often rings frighteningly true"
For further exploring for "frighteningly" in Webster Dictionary Online