What does the term "plod" most closely mean?

The term "plod" most closely means to walk heavily and firmly, which aligns with the idea of moving at a slow and deliberate pace, often associated with effort and a lack of grace. This word evokes the image of a laborious, steady pace, particularly when one is carrying something heavy or is tired. In contrast to the other choices, "plod" conveys a sense of slow, measured movement rather than abruptness or speed. The essence of "plodding" suggests a focused, determined effort, often used to describe someone who is methodical in their approach, such as when they’re making their way through difficult circumstances. This nuanced meaning relates closely to hard work and persistence, while the other options imply more sudden or hurried actions.