CRED
CRED comes from credere, the Latin verb meaning "to believe" or "to entrust".
比如credit，incredible
credence： mental acceptance of something as true or real; belief
相信(belief)，接受（acceptance）
credible:
credulity: readiness and willingness to believe on the basis of little evidence.
易受骗的，一点点小小的证据就会相信。
credo: (1) a statement of the basic beliefs of a religious faith.
(2) a set of guiding principles or beliefs
FID
FID comes from fides, the Latin word for "faith" or "trust".
diffident: lacking confidence; timid, cautious.
羞怯的
fiduciary: (1) having to do with a confidence or trust. (2) held in trust for another
大多和信托有关
perfidy: faithlessness, disloyalty, or treachery
