English word fiduciary comes from Proto-Indo-European *bʰeydʰ-, and later Proto-Indo-European *bʰéydʰeti (To trust.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *bʰeydʰ- | Proto-Indo-European (ine) | to command, to persuade, to trust |
| *bʰéydʰeti | Proto-Indo-European (ine) | To trust. |
| *feiðō | Proto-Italic (itc-pro) | Trust. |
| fidere | Latin (lat) | |
| fiducia | Latin (lat) | (legal) deposit, pledge, mortgage. Boldness, courage. Trust, confidence, assurance, reliance. |
| fiduciarius | Latin (lat) | (by extension) entrusted, given, held in trust. (law) of or relating to a thing held in trust, fiduciary. |
| fiduciary | English (en) | (legal) Relating to an entity that owes to another good faith, accountability and trust, often in the context of trusts and trustees.. Pertaining to paper money whose value depends on public confidence or securities. (legal) One who holds a thing in trust for another; a trustee.. (theology) One who depends for salvation on faith, without works; an antinomian. |