diabolical
(Informal)
[adjective]
Synonyms: dreadful, abysmal, appalling, atrocious, hellish, outrageous, shocking, terrible

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English Thesaurus: terrible/awful, horrible, appalling, disgusting, lousy, ...

[TahlilGaran] English Synonym Dictionary ▲

di‧a‧bol‧i‧cal /ˌdaɪəˈbɒlɪkəl◂ $ -ˈbɑː-/ adjective
[Date: 1300-1400; Language: French; Origin: diabolique, from Greek diabolos 'devil']

1. (also di‧a‧bol‧ic /ˌdaɪəˈbɒ◂lɪk $ -ˈbɑː-/) evil or cruel:
diabolical abuse

2. British English informal extremely unpleasant or bad:
The toilets were in a diabolical state.
—diabolically /-kli/ adverb

[TahlilGaran] Dictionary of Contemporary English ▲

terrible/awful (also dreadful especially British English) very bad:
The journey was terrible – it took six hours.
The food was good but we had terrible service.
It’s such an awful programme! How can you watch it?
He looked dreadful.
horrible very bad and unpleasant – used especially when something has a strong effect on you and you feel shocked, annoyed, or sick:
This soup tastes horrible.
I got a horrible shock when I saw the bill.
a horrible accident
a horrible thing to say to someone
appalling terrible – especially in a way that is shocking. Appalling is stronger and a little more formal than terrible or horrible:
The refugees are living in appalling conditions.
The teacher said my handwriting was appalling.
disgusting terrible – used about a taste, smell, habit etc, often one that makes you feel sick:
The smell was disgusting and I had to go out.
Do you have to bite your nails? It’s a disgusting habit.
lousy informal terrible – used especially to express annoyance:
I’ve had a lousy day at the office.
This area is a lousy place to live.
hopeless very bad and difficult – used when there is no chance of success or improvement:
We were trying to pay off our debts but it was a hopeless situation.
He was given the almost hopeless task of trying to negotiate a ceasefire.
diabolical British English extremely bad – used to express great disapproval of an action or event:
The prices are diabolical.
a diabolical waste of money
McAndrew gave a diabolical performance on Saturday.

[TahlilGaran] English Thesaurus ▲