unshift

/ʌnˈʃɪft/
verb
  1. To release or move something from a shifted position; to undo a shift.
    • He had to unshift the gears to get the car out of the mud.
    • She unshifted the heavy box from the top shelf to a lower one.
    • The programmer used a command to unshift the bits back to their original order.
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