How would you describe something that has great weight and lacks grace?

The term that best describes something that has great weight and lacks grace is "ponderous." This word conveys a sense of heaviness and clumsiness, often used not only in a literal sense to describe physical objects but also figuratively to characterize pieces of writing or movements that feel heavy and slow.

In context, something described as ponderous may be cumbersome and difficult to manage or navigate, emphasizing both its weight and its awkwardness. For example, a ponderous piece of machinery or a ponderous style of writing suggests a serious, substantial nature that can be heavy on the reader or observer, lacking the lightness and elegance that can make such things more appealing or functional.

The other options present different meanings that do not align with the description of weight and grace. "Mollify" relates to calming or soothing, "pique" refers to stimulating interest or curiosity, and "myriad" indicates a large number or multitude. None of these words capture the essence of heaviness or a lack of grace as effectively as "ponderous."