impetuosity的复数形式怎么拼写？

n.激烈，冲动，性急...

With characteristic impetuosity, he announced he was leaving school.一贯性急冲动的他又宣布要退学了。Impetuosity will only make things worse.急躁只能坏事.Blind faith and impetuosity have led them into their present difficulties.盲从和狂热使他们陷入目前的困境...

impetuosity的音标：impetuosity的英式发音音标为：[ɪmˌpetʃʊ'ɒsətɪ]impetuosity的美式发音音标为：[ɪmˌpɛtʃu'ɑsɪti]...