seriousness
n. 严重性；严肃；认真
例句
I hope you realize the seriousness of this crime.
我希望你能认识到这一罪行的严重性。
《牛津词典》
Her voice was imbued with an unusual seriousness.
她的声音里充满着一种不寻常的严肃语气。
The seriousness of the crime cannot be overstated.
这一罪行的严重性怎么说也不为过。
