How to remove a field completely from a MongoDB document?

{ 
    name: 'book',
    tags: {
        words: ['abc','123'],
        lat: 33,
        long: 22
    }
}

Suppose this is a document. How do I remove “words” completely from all the documents in this collection? I want all documents to be without “words“:

 { 
     name: 'book',
     tags: {
         lat: 33,
         long: 22
     }
}