Rhadamanthine
Etymology
From Rhadamanthus, a son of Zeus in Greek myth renowned for his wisdom and inflexible fairness, who was made one of the judges of the dead in the underworld. His name became the adjective for judgment that is severe precisely because it is scrupulously just — stern, exacting, and impossible to sway.
adjective · /rad-uh-MAN-thin/
Rigorously strict, just, and incorruptible in judgment.
What it names
Justice that is unbending and beyond bribery — reach for it for a judge, referee, or authority whose fairness is absolute and utterly without leniency.
Example
The examiner applied the rules with rhadamanthine strictness, disqualifying his own nephew without a flicker of hesitation.
Related idea
Draconian implies harshness that is disproportionate or cruel; rhadamanthine implies severity that is exactly, incorruptibly just — hard, but never unfair.