Which prefix can be used to describe something that goes beyond normal limits?

The prefix that describes something that goes beyond normal limits is "ultra-." This prefix originates from Latin, meaning "beyond" or "extreme." It is commonly used in various contexts to denote an intensity or degree that exceeds the usual or expected level. For instance, "ultraviolet" refers to light with a wavelength shorter than visible light, indicating a level beyond what humans can typically see.

While "trans-" also signifies movement beyond a boundary, it usually refers to crossing from one state or place to another rather than emphasizing an extreme degree. Similarly, "super-" indicates superiority or being above standard but does not specifically convey exceeding limits in the same way "ultra-" does. The prefix "tachy-" relates to speed, specifically "fast" or "rapid," without connotations of going beyond normal limits in a broad sense. Therefore, "ultra-" is the most precise choice for describing something that crosses normal thresholds.