|Origin:||shore 'piece of wood used as a support' (15-20 centuries), from Middle Dutch or Middle Low German schore 'prop'|
shore something ↔ upphrasal verb
to support a wall or roof with large pieces of wood, metal etc to stop it from falling down:
The roof had been shored up with old timbers.
to help or support something that is likely to fail or is not working well:
attempts to shore up the struggling economy