earnestness 

英汉解释

n. 认真；诚挚；正经

同义词

n. serious-mindedness，seriousness，sincerity

反义词

n.   frivolity，frivolousness

参考例句

1. This Sunday, your earnestness and warmth will win you respect and affection.
这个星期天，你的诚挚和热情将获得他人的尊重和喜爱。
2. They are attentive and full of earnestness in working time, but they never work in recreation time.
他们在工作期间严肃认真，一丝不苟，但娱乐时间决不工作。
3. " To this end, visited Singapore and earnestness of a high school principal, said: "uncivilized behavior, national humiliation.
为此，到新加坡考察的一位中学校长语重心长地说：“不文明行为也，国耻。”

英英解释

n.
  1. an earnest and sincere feeling
  2. the trait of being serious

网络释义

earnestness
正经; 认真; 诚挚;
Inquiring with Earnestness and Reflecting withSelf-practice
复旦大学(始建于1905年)：博学而笃志 切问而近思; 博学而笃志 切问而近思;