Noun:

1. the trait of being difficult to handle or overcome

2. resolute adherence to your own ideas or desires

stupidityn.愚笨；愚蠢的行为

stubbornnessn.顽固；棘手形容词stubborn的名词形式.

determinationn.决心；测定；规定；(正式)决定；定位

inflexibilityn.不屈曲性；顽固；不变性

persistencen.坚持；毅力

tenacityn.坚韧；固执；不屈不挠；顽固

intransigencen.不妥协；不让步

obstinancen.顽固；固执

bullheadednessadj.顽固的；刚愎自用的

self-willn.任性；固执

mulishnessadj.骡似的；执拗的；杂种的

pigheadednessn.顽固；固执；愚顽

1. Sheer obstinacy prevented her from apologizing.
   她固执得就是不道歉。