The term "up-turns" implies positive progress or changes. Therefore, suitable antonyms for "up-turns" can be downturns, setbacks, reversals, or declines. These terms indicate a negative shift in the situation, which opposes the concept of growth and improvement. A downturn suggests a decline in economic activity or slowing down of progress, while a setback indicates an unexpected obstacle or delay that slows down an ongoing project or plan. Similarly, a reversal implies a change of previously achieved progress, and a decline suggests a reduction in quality or quantity. Hence, using antonyms for "up-turns" offers a way to express negative developments and setbacks.