You searched for: “affidation”
affidation (s) (noun), affidations (pl)
A solemn and mutual promise of fidelity (loyalty to a person, a principle, or an organization): "Jeremy's affidation was that he would complete the project by a certain date."
This entry is located in the following units: -ation, -ization (-iz[e] + -ation); -isation (British spelling variation) (page 4) fid-, fidel- (page 1)