
This is a hard haiku constraint because ACUTE is precise but not naturally image-bearing. It tends to summarize intensity rather than show it, so the craft problem is giving the word something concrete to sharpen. Starr’s “Remains to INTER / Air is STALE and colored TAUPE / Fragrance is ACUTE” is a good example: the constraint words are absorbed into one fully realized sensory environment, so ACUTE arrives as an earned amplification of the scene rather than an abstract adjective dropped on top. Across the set, the stronger poems make the target word function as sensory pressure, distress, wit, perception, or lack, which is what keeps the haiku from flattening into description.