To 'shore up' something means to prop something up or to support something in some way, or to make something stronger by supporting it. This is a phrasal verb you are more likely to hear in professional contexts.

1. The government hope that the recent tax increases will go some way to shoring up the nation's faltering economy.
2. Workers shored up the roof that had been damaged in the strong winds.

1. Alan had to take funds from his successful restaurant to shore up his other businesses which were struggling. 
2. My boss's kind words shored me up a bit before I got on stage to deliver the keynote speech at the conference.