adverb, adverb taking the 'to' particle
trudging; plodding; walking slowly with heavy steps
Describes walking slowly and wearily, often with a sense of dejection or exhaustion. Commonly used with 歩く or as an adverb with と.
彼は疲れた様子でとぼとぼと歩いていた。
He was trudging along, looking tired.
After losing the match, the players plodded off the field.