trudge
"To Trudge: the slow weary depressing yet determined walk of a man (or woman) who has nothing left in his (or her) life except the impulse to simply soldier on." (Chaucer, "A Knight's Tale")
"{Chaucer} Morning! Morning! {William} Why sir, what are you doing? {Chaucer} Uh, trudging.  You know, Trudging? To Trudge?"