English
Senatical
From Senate + -ical.
Formed from Senate + -ical
Proto-Indo-European *sénos ‘old’
…
Latin senex ‘old man; old’
Latin senātus ‘council of elders, senate’
Old French senat
Middle English senat
English Senate
Today it means
adj Of, by, or pertaining to the Senate of Ancient Rome.
Language periods are conventional ranges, not dates for this word.
Etymograph / Senatical