FRIGHTFUL
atrocious, frightful, horrifying, horrible, ugly
(adjective) 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”
fearful, frightful
(adjective) extremely distressing; “fearful slum conditions”; “a frightful mistake”
frightful, terrible, awful, tremendous
(adjective) extreme in degree or extent or amount or impact; “in a frightful hurry”; “spent a frightful amount of money”
Source: WordNet® 3.1
Etymology
Adjective
frightful (comparative more frightful, superlative most frightful)
(obsolete) Full of fright, whether
Afraid, frightened.
Timid, fearful, easily frightened.
Full of something causing fright, whether
Genuinely horrific, awful, or alarming.
(hyperbolic) Unpleasant, dreadful, awful (also used as an intensifier).
Synonyms
• See frightening
• See bad
Adverb
frightful (comparative more frightful, superlative most frightful)
(dialect) Frightfully; very.
Source: Wiktionary
Fright"ful, a.
1. Full of fright; affrighted; frightened. [Obs.]
See how the frightful herds run from the wood. W. Browne.
2. Full of that which causes fright; exciting alarm; impressing
terror; shocking; as, a frightful chasm, or tempest; a frightful
appearance.
Syn.
– Terrible; dreadful; alarming; fearful; terrific; awful; horrid;
horrible; shocking.
– Frightful, Dreadful, Awful. These words all express fear. In
frightful, it is a sudden emotion; in dreadful, it is deeper and more
prolonged; in awful, the fear is mingled with the emotion of awe,
which subdues us before the presence of some invisible power. An
accident may be frightful; the approach of death is dreadful to most
men; the convulsions of the earthquake are awful.
Source: Webster’s Unabridged Dictionary 1913 Edition