Is it farther or further?
late 13c., from Old French governer (11c., Modern French gouverner) "govern," from Latin gubernare "to direct, rule, guide, govern" (cf. Spanish gobernar, Italian governare), originally "to steer," a nautical borrowing from Greek kybernan "to steer or pilot a ship, direct" (the root of cybernetics). The -k- to -g- sound shift is perhaps via the medium of Etruscan. Related: Governed; governing.