From Greek 'axiōma' (that which is thought worthy), from 'axios' (worthy) — literally a proposition that weighs enough to need no proof.
A self-evident truth requiring no proof; a fundamental principle.
From Latin axiōma (a principle, a self-evident proposition), from Greek axiōma (that which is thought worthy or fit, a self-evident principle), from axioun (to think worthy, to deem fit), from axios (worthy, of equal weight, deserving), from PIE *h₂eǵ- (to drive, to lead). The Proto-Indo-European root *h₂eǵ- meant to drive or lead, and its semantic evolution toward worthiness came through the idea of something that carries weight, that drives conviction. Greek axios (worthy) described what was deemed fitting or appropriate — an axiom was originally a proposition considered worthy of acceptance without proof, something so self-evidently correct that it needed no demonstration. Aristotle used axiōma as a technical term in logic