Etymograph

English

fiducial

Fiducial comes from Late Latin fīdūcia ‘trust, reliance’, and goes back to Proto-Indo-European *bʰeydʰ-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*bʰeydʰ-‘to trust’reconstructed
  2. Proto-Indo-European, derivedc. 4500–2500 BCE*bʰéydʰeti‘to trust’reconstructed
  3. Proto-Italicc. 1500–700 BCE*feiðō‘to trust’reconstructed
  4. Late Latinc. 200–600 CEfīdō‘to trust’
  5. Late Latin, derivedc. 200–600 CEfīdūcia‘trust, reliance’
  6. Late Latin, derivedc. 200–600 CEfīdūciālis
  7. Englishtodayfiducial

attested reconstructed ? uncertain or disputed

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*bʰeydʰ-‘to trust’reconstructed
  2. Proto-Indo-European, derivedc. 4500–2500 BCE*bʰéydʰeti‘to trust’reconstructed
  3. Proto-Italicc. 1500–700 BCE*feiðō‘to trust’reconstructed
  4. Late Latinc. 200–600 CEfīdō‘to trust’
  5. Late Latin, derivedc. 200–600 CEfīdūcia‘trust, reliance’
  6. Late Latin, derivedc. 200–600 CEfīdūciālis
  7. Englishtodayfiducial

Linked words

through Proto-Indo-European *bʰeydʰ- ‘to trust’

federal, federation, confederate, defy, fidelity, defiance, bode, foi, fealty, infidel, confidante, perfidy, 25 more

through Proto-Indo-European *bʰéydʰeti ‘to trust’

abide, bide, 6 more

through Late Latin fīdō ‘to trust’

confidence, confident, affidavit, confidant, confide, diffident, 3 more

Today it means

adj Accepted as a fixed basis of reference.

Language periods are conventional ranges, not dates for this word.

Etymograph / Proto-Indo-European *bʰeydʰ- / fiducial

Shirt and support for this word