English
agential
From agent + -ial.
A compound of agent + -ial
Proto-Indo-European *h₂eǵ-
Proto-Indo-European *h₂éǵeti ‘to be driving’
Proto-Italic *agō ‘to drive’
Latin agō ‘to act’
Latin agēns ‘doing’
English agent
Today it means
adj Of or pertaining to an agent or an agency.
Language periods are conventional ranges, not dates for this word.
Etymograph / agential