to modify / modification
โModifyโ means toย change something slightlyย โ often in a technical way โ in order to meet new regulations. So, for instance, companies often modify their products because of new laws or to satisfy regulations in countries they want to export to. If an engine is modified, it means that itโs been changed โ for instance, more more powerful or cleaner.
The software has beenย modifiedย to protect users against viruses.ย