Drupal 8, Search API SOLR.
I'd like to not return nodes if there are any matches between a field of negative keywords (on the node) and the query string the user has entered.
search_api_solr currently set up with several fields, matching in node titles, body and keyword fields.
e.g. node titled "I can't find my elephant" with a negative keyword field containing "wallet" to not show up in a search "I can't find my wallet".