Supporting, reinforcing; (music) of or related to accompaniment
Standby, reserve or extra.
That is intended as a backup.
reinforcements
A copy of a file or record, stored separately from the original, that can be used to recover the original if it is destroyed or damaged.
A reserve or substitute.
An accumulation of material caused by a (partial) obstruction or (complete) blockage of the flow or movement of the material, or an accumulation of material that causes an overflow due to the flow being greater than the maximum possible flow.
Something which obstructs or impedes, either intentionally or unintentionally
The act of obstructing, or state of being obstructed.
The condition of having the natural powers obstructed in their usual course; the arrest of the vital functions; death.