fiend·ish /ˈfiːndɪʃ/ adjectiveadj 1 CRUELcruel and unpleasant 凶恶的;残酷的 a particularly fiendish practical joke 残忍的恶作剧
2 INTELLIGENTvery clever in an unpleasant way 刁钻的 3 DIFFICULTUNPLEASANTextremely difficult or complicated 极其困难[复杂]的 several fiendish exam questions 几道很难的试题
—fiendishly adverbadv
—fiendishness noun [uncountableU]