► 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.
1 (also di‧a‧bol‧ic /ˌdaɪəˈbɒ◂lɪk $ -ˈbɑː-/) evil or cruel: 
diabolical abuse2 British English informal extremely unpleasant or bad: