1. very heavy and difficult to move or carry
2. slow and awkward because of great weight or size
3. dull, boring, or overly serious in a way that seems heavy or labored

Examples

• The workers struggled to move the ponderous stone blocks.
• The elephant’s ponderous steps shook the ground.
• His ponderous writing style made the novel difficult to read.
• The ponderous machinery required several people to operate.
• She gave a ponderous speech that put half the audience to sleep.
• The ponderous truck moved slowly up the steep hill.
• The professor’s ponderous explanations confused rather than clarified the topic.