a·lac·ri·ty
noun/əˈlækrəti/
/əˈlækrəti/
[uncountable] (formal)- great happiness or enthusiasm
欣然同意;十分乐意 - They accepted the offer with alacrity.
他们欣然接受了建议。
Word Originlate Middle English: from Latin alacritas, from alacer ‘brisk’. - They accepted the offer with alacrity.