Main Entry: ²bolster

Function: transitive verb

Inflected Form(s): bol·stered; bol·ster·ing \-st(ə-)riŋ\

Date: 15th century

1 : to support with or as if with a bolster : reinforce
2 : to give a boost to <news that bolstered his spirits>

— bol·ster·er \-stər-ər\ noun