Frightful

a.	1.	Full of fright; affrighted; frightened. 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.

Adj.	1.	frightful - 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" Synonyms: horrible, horrifying, atrocious, ugly
	2.	frightful - extreme in degree; "in a frightful hurry"; "spent a frightful amount of money"
	3.	frightful - extremely distressing; "fearful slum conditions"; "a frightful mistake"; "suffered terrible thirst" Synonyms: fearful, terrible

abhorrent, abominable, alarming, appalling, atrocious, awful, awing, chilling, daunting, deadly, deterrent, deterring, disagreeable, disconcerting, discouraging, disheartening, dismaying, disquieting, dreadful, fear-inspiring, fearful, fearsome, forbidding, formidable, foul, frightening, ghastly, grisly, gruesome, hideous, horrendous, horrible, horrid, horrific, horrifying, howling, loathsome, lurid, macabre, nasty, nauseating, nauseous, offensive, overawing, repelling, repugnant, repulsive, revolting, rousing, scaring, scary, shocking, startling, terrible, terrific, thumping, ugly, unspeakable, vile, whacking