underpinning

US /ˈʌn.dɚˌpɪn.ɪŋ/
UK /ˈʌn.dɚˌpɪn.ɪŋ/
"underpinning" picture
1.

fondement, base, soutien

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.
Le principal fondement de la théorie est basé sur des recherches approfondies.
Strong ethical principles form the underpinning of their business.
Des principes éthiques solides constituent le fondement de leur entreprise.