posílit se znamená v angličtina

bolster [bolstered, bolstering, bolsters]▼(to brace, reinforce, secure, or support)
verb
[UK: ˈbəʊl.stə(r)] [US: ˈboʊl.stə(r)]

brace [braced, bracing, braces]▼(to prepare for something bad)
verb
[UK: breɪs] [US: ˈbreɪs]