underpinning
US /ˈʌn.dɚˌpɪn.ɪŋ/
UK /ˈʌn.dɚˌpɪn.ɪŋ/

1.
onderbouwing, fundament, basis
a set of ideas, figures, or structures that provides a base or foundation for something
:
•
The theory's main underpinning is based on extensive research.
De belangrijkste onderbouwing van de theorie is gebaseerd op uitgebreid onderzoek.
•
Strong ethical principles form the underpinning of their business.
Sterke ethische principes vormen de onderbouwing van hun bedrijf.