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Synonyms
bol·ster (bōĺstər)

[Middle English, from Old English.]

noun 

A long narrow pillow or cushion.

transitive verb: -stered, -ster·ing, -sters. 

  1. To support or prop up with or as if with a long narrow pillow or cushion.
  2. To buoy up or hearten: Visitors bolstered the patient's morale.

derivatives

boĺster·er
noun