incidental
US /ˌɪn.sɪˈden.t̬əl/
UK /ˌɪn.sɪˈden.t̬əl/

1.
incidentale, accessorio, secondario
happening as a minor accompaniment to something else
:
•
The discovery was incidental to their main research.
La scoperta è stata incidentale alla loro ricerca principale.
•
Any costs incurred will be purely incidental.
Qualsiasi costo sostenuto sarà puramente incidentale.