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English definition of “bolster”

bolster

verb [T]     /ˈbəʊl.stər/ US  /ˈboʊl.stɚ/
to support or improve something or make it stronger : More money is needed to bolster the industry . She tried to bolster my confidence / morale (= encourage me and make me feel stronger ) by telling me that I had a special talent . They need to do something to bolster their image .Physical supports and supportingArches, columns and beamsBecoming and making stronger
(Definition of bolster verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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