adj. scary, terrifying; dreadful, terrible; shocking; unpleasant, annoying (Slang)

The following video provides you with the correct English pronunciation of the word "frightful", to help you become a better English speaker.

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Adjective
1. provoking horror; "an atrocious automobile accident"; "a frightful crime of decapitation"; "an alarming, even horrifying, picture"; "war is beyond all words horrible"- Winston Churchill; "an ugly wound"
(synonym) atrocious, horrifying, horrible, ugly
(similar) alarming
2. extreme in degree; "in a frightful hurry"; "spent a frightful amount of money"
(similar) extraordinary
(classification) colloquialism
3. extremely distressing; "fearful slum conditions"; "a frightful mistake"; "suffered terrible thirst"
(synonym) fearful, terrible
(similar) bad

příd.jm. hrozný, hrozivý, strašný

Przym. okropny; straszny

(a.)
Full of that which causes fright; exciting alarm; impressing terror; shocking; as, a frightful chasm, or tempest; a frightful appearance.
  

(a.)
Full of fright; affrighted; frightened.