I'm reading a simple story about the Argonauts, and near the beginning, after the crew has been assembled:
...then Jason having waited a few days, ut ad omnis casus subsidia compararet, launched the ship.
Without looking a a dictionary, I assumed that subsidia might have something to do with subsidence - "so that he could provide a chance for everyone to leave" i.e. have a change of heart. But no! subsidia, in my dictionary, means auxilliary troops, aid, help. So "so that he could provide the auxilliary troops of chance to everyone"? doesn't seem to me to make sense. Any help would be appreciated.