What term describes something that is sharp and impactful on the senses?

The term "vivid" is used to describe something that is exceptionally bright, powerful, and impactful, particularly in its effect on the senses. When something is vivid, it captures attention and creates a strong mental image or impression. This can apply to colors that are strikingly bright, descriptions that evoke strong imagery, or experiences that are intensely felt.

In contrast, the other options do not convey the same sense of sharpness or sensory impact. "Sullen" refers to a gloomy or sulky disposition, "lamentation" is the expression of sorrow or mourning, and "indelible" denotes something that is not able to be removed or forgotten, often implying a lasting impression but without the sensory sharpness that "vivid" encompasses. Therefore, "vivid" stands out as the most suitable choice to describe something that is both sharp and impactful on the senses.