buffer

An implement consisting of soft material mounted on a block; used for polishing (as in manicuring)

A cushion-like device that reduces shock due to an impact

A power tool used to buff surfaces

(computer science) a part of RAM used for temporary storage of data that is waiting to be sent to a device; used to compensate for differences in the rate of flow of data between components of a computer system

An inclined metal frame at the front of a locomotive to clear the track

A neutral zone between two rival powers that is created in order to diminish the danger of conflict

(chemistry) an ionic compound that resists changes in its pH

Add a buffer (a solution)

“Buffered saline solution for the eyes”

Protect from impact

“Cushion the blow”