plodder

(noun) someone who walks in a laborious heavy-footed manner. Synonyms: trudger, slogger.

(noun) someone who works slowly and monotonously for long hours. Synonyms: slogger.

(noun) someone who moves slowly. Synonyms: slowpoke, stick-in-the-mud, slowcoach. Example: "In england they call a slowpoke a slowcoach."