We are going to celebrate my husband's birthday at home with some friends, so I'm preparing everything for the party.

celebrate 是动词，意思是"庆祝、庆贺"，指通过某种活动或仪式来纪念或欢庆某个特殊的日子或事件。这个词来自拉丁语 celebrare，原意是"很多人聚集在一起举行仪式"。