bol‧ster1 /ˈbəʊlstə $ ˈboʊlstər/ (
also bolster up)
 verb [transitive]1.  to help someone to feel better and more positive
 Synonym : boost: 
 He is making a bold attempt to bolster the territory’s confidence.2.
 He is making a bold attempt to bolster the territory’s confidence.2.  to improve something
 Synonym : boost: 
 his efforts to bolster his career
 his efforts to bolster his career  [TahlilGaran] Dictionary of Contemporary English ▲