"plod" in the noun sense
1. plodding, plod
the act of walking with a slow heavy gait
"I could recognize his plod anywhere"
"plod" in the verb sense
1. slog, footslog, plod, trudge, pad, tramp
walk heavily and firmly, as when weary, or through mud
"Mules plodded in a circle around a grindstone"
Source: WordNet® (An amazing lexical database of English)
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