Error when searching specific fields in Rails

I'm pretty new to this so bear with me. Everything seems to work except I can't figure out how to prevent the :p_s, :gender, and :part_of_speech fields from showing in the search results.

This article says I need to indicate no somewhere so the fields aren't searchable. How do I implement this in the code below? Please let me know if you need more info.

And to be clear, removing those three fields from the indexes portion below doesn't work. I just added them for sake of illustration.

require 'elasticsearch/model'

class Term < ActiveRecord::Base
 ...

    mappings dynamic: 'false' do
      indexes :id, index: :not_analyzed
      indexes :name, Index: spanish_analyzer
      indexes :p_s
      indexes :gender
      indexes :part_of_speech
      indexes :definition, analyzer: :combined_analyzer
      indexes :etymology1, analyzer: :combined_analyzer
      indexes :etymology2, analyzer: :combined_analyzer
      indexes :uses, analyzer: :combined_analyzer
      indexes :notes1, analyzer: :combined_analyzer
      indexes :notes2, analyzer: :combined_analyzer
    end
  end

  def self.search(query)
    __elasticsearch__.search(
      {
        query: {
          multi_match: {
            query: query,
            fields: ['name^7', 'definition^6', 'etymology1^5', 'etymology2^4', 'uses^3', 'notes1^2', 'notes2^1'],
            operator: 'and'
          }
        }
      }
    )
  end
end