the restoration of fortunes: God turning a ruined situation back to well-being
This word almost always appears in a set phrase, literally something like "turn the turning," that means to reverse a disaster and restore what was lost. Older Bibles rendered it "bring again the captivity," reading it as the return of exiles, but the phrase is used in places where no captivity was ever in view: God restores the fortunes of Job, a man who was never a prisoner, and of Sodom, a city that was destroyed rather than deported. It is also used before the Babylonian exile ever happened and of foreign nations who were never carried off to Babylon. So its core sense is broader than captivity: it names a decisive turnaround, a reversal of a decreed judgment or a wrecked condition back to flourishing.
The reversal is always God's doing, and it carries the weight of covenant hope: the God who brought the ruin is the one who turns it around. In the book of Jeremiah, where the phrase clusters most thickly, the fortunes being restored do specifically include bringing the exiles home from Babylon, so there the older "captivity" reading and the broader "fortunes" reading point at the same event. But the phrase itself names the reversal, not the captivity, and elsewhere the ruin being reversed is something else entirely.
Because it is a fixed idiom rather than an ordinary noun, no single English word captures it. Translators reach for "restore the fortunes," "restore the well-being," or the older "bring again the captivity," and each catches only part of it.