temerity

1. N-UNCOUNT If you say that a person has the temerity to do something, you are annoyed about something they have done which you think showed a lack of respect. 失禮[usu N to-inf] [表不滿]

"Difficult" patients have the temerity to challenge their doctors' decisions. “難纏”的病號會冒然挑戰他們的毉生的決定。