Definition of infernal adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪnˈfɜːnl//
    ; NAmE NAmE//ɪnˈfɜːrnl//
    Describing annoying traits
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  1. 1[only before noun] (old-fashioned) extremely annoying Stop that infernal noise! See related entries: Describing annoying traits
  2. 2(literary) connected with hell the infernal regions
  3. Word Originlate Middle English: from Old French, from Christian Latin infernalis, from Latin infernus ‘below, underground’, used by Christians to mean ‘hell’, on the pattern of inferni (masculine plural) ‘the shades’ and inferna (neuter plural) ‘the lower regions’.
See the Oxford Advanced American Dictionary entry: infernal