ETYMOLOGY
from Latin plenipotens, plenipotent, from Latin pleni- (full) + potens (potent, powerful)
EXAMPLE (for adj.)
“… (being now grown by their rents and Lordly dignities, by their power over the Ministers and other liege’s, by their places in Parliament, Council, Session, Exchequer, and high Commission to a plenipotent dominion and greatness) they frame a book of Canons for ruling the Kirk and disposing upon religion at their pleasure. …”
From: The Remonstrance of the Nobility, Barrones, Burgesses, Ministers and Commons within the Kingdom of Scotland,
Church of Scotland. General Assembly, 1639
Lexicophilia 