in·fer·nal
                 inˈfərnl/                                  adjective
adjective: infernal
1.        relating to or characteristic  
                       of hell or the underworld.
"the infernal                                regions"
synonyms: hellis­h, nether,
                  subterranean, underworld,               chthonic,
                Tartarean; satanic, devilish,                            diabolical, fiendish,                    demonic
                            ­                     "the infernal regions"

2.
                            informal
irritating     ­                       & tiresome (used for                  emphasis).
   "you're an                          infernal nuisance"
               synonyms: damnable, wretched,            confounded; annoying,
         irritating, infuriating,                      irksome, detestable,         exasperating;
            informal
            ******, ****, blasted, blessed,
            pesky, aggravating; informal,                cursed
"an infernal nuisance"
                       Origin:                        late Middle
   English: from
Old French,                              from Christian
Latin                                        infernalis, from Latin
  ‘below,             underground,’                                       used
                                           by Christians to mean ‘hell,’
            on the pattern             of                                              inferni
                                           (masculine plural)                        ‘the shades’
&           inferna
                            (neuter plural)
‘the lower regions.’
Translate infernal to adjective:
1. skëterror
2. i tmerrshëm