diabolical - definition and synonyms

adjective 

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/ˌdaɪəˈbɒlɪk(ə)l/
  1. 1
    informal very bad

    The food at the hotel was diabolical.

  2. 2
    evil or cruel
     Synonyms and related words
     Synonyms and related words

derived word

diabolically

adverb
 Synonyms and related words
 Synonyms and related words
 Synonyms and related words