Origin: 1300–50;Middle Englishenvirounen < Old Frenchenvironner, derivative of environ around (enen-1 + viron a circle; vir(er) to turn, veer + -on noun suffix)
1660s, from Fr. environs, pl. of O.Fr. environ "compass, circuit," from environ (adv.) "around," from en- "in" + viron "circle, circuit," from virer "to turn." Related: Environed.