Synonyms of diabolical in English:


See US English definition of diabolical

See UK English definition of diabolical

See Spanish definition of diabólico


1‘his diabolical skill’

devilish, diabolic, fiendish, satanic, Mephistophelian, demonic, demoniacal, hellish, infernal, evil, wicked, ungodly, unholy
rare cacodemonic

2‘the team manager was sacked after that diabolical performance’

very bad, poor, dreadful, awful, terrible, frightful, disgraceful, shameful, lamentable, deplorable, appalling, atrocious
inferior, substandard, mediocre, unsatisfactory, inadequate, second-rate, third-rate, shoddy, inept, bungling, hopeless
informal crummy, dire, dismal, godawful, shocking, abysmal, bum, rotten, pathetic, woeful, pitiful, lousy, useless, the pits
British informal duff, rubbish, ropy, chronic, a load of pants, poxy
vulgar slang crap, crappy, shitty
North American vulgar slang chickenshit, hellacious
archaic direful
rare egregious


3‘a diabolical liberty’

very great, extreme, excessive, undue, inordinate, immoderate, unconscionable, outrageous
uncalled for, unprovoked, intolerable, unacceptable, unreasonable, unjustifiable, unwarrantable, without justification, indefensible, inexcusable, unforgivable, unpardonable