verb/ʁə.tuʁ.ne/
to turn over, turn upside-down; (in cooking) to turn; to toss (salad), turn over (earth, soil); to return, send back (an object); to return, go back (to/from a place); to return, revert (à to) (a state etc)
“J'ai retourné le livre pour en voir le prix.” — I turned the book over to see the price of it.
Inherited from Old French retorner, from re- + torner; morphologically, from re- + tourner.