Nouns

(n)fiduciarya person who holds assets in trust for a beneficiary“it is illegal for a fiduciary to misappropriate money for personal gain”

Adjectives

(a)fiduciary, fiducialrelating to or of the nature of a legal trust (i.e. the holding of something in trust for another)“a fiduciary contract”, “in a fiduciary capacity”, “fiducial power”