means To recover or pull together after a setback — whether that's a person regaining strength, a market bouncing back, or a crowd gathering for a shared cause.

from From the French 'rallier,' meaning to reunite or bring back together — built from 're-' (again) plus 'allier' (to ally, to bind). It's a close cousin of the English word 'ally.' The original sense was military: scattered troops re-gathering after the line broke and regrouping to fight on. From soldiers reforming their ranks, the word spread outward to anyone or anything that recovers and reassembles — the sick body, the slumping team, the falling stock, the political crowd.