fright ‧ ful /ˈfraɪtf ə l/ BrE AmE adjective old-fashioned especially British English
[ Word Family: adjective : ↑ frightened , ↑ frightening , ↑ frightful ; noun : ↑ fright , ↑ frighteners ; adverb : ↑ frighteningly , ↑ frightfully ; verb : ↑ frighten ]
1 . unpleasant or bad SYN awful , terrible :
There’s been a frightful accident.
2 . used to emphasize how bad something is SYN awful , terrible :
Her hair was a frightful mess.