1. To walk slowly and heavily: This is the most common meaning of "plod." It suggests a lack of energy or enthusiasm, and often implies a feeling of weariness or difficulty.
Example: *The hiker plodded along the dusty trail, his backpack weighing him down.*
2. To work or proceed in a slow, steady, and often tedious way: This meaning emphasizes the lack of excitement or inspiration in the work.
Example: *The students plodded through their homework, hoping to finish before bedtime.*
3. (noun) A slow, heavy step: This is a less common usage, but still valid.
Example: *He walked with a heavy plod, his boots sinking into the mud.*
In general, "plod" carries a negative connotation, suggesting a lack of excitement or progress. It's often used to describe someone who is tired, unmotivated, or struggling to achieve a goal.