Fair
Equal, equitable, or whatever suits the moment.
How We Say It
fair
Where It Comes From
Old English fæger — beautiful, pleasant. Separately, Old English fæger also meant fitting, proper. The two senses — aesthetic and ethical — ran in parallel for centuries before the ethical meaning dominated.
How It's Been Used
Among the most contested words in politics because it contains two irreconcilable definitions: equal treatment (same rules for everyone) versus equitable treatment (different rules to produce equal outcomes). 'That's not fair' is a primal complaint; what it means is never obvious.