slog
       v 1: work doggedly or persistently; "She keeps plugging away at
            her dissertation" [syn: plug away, peg away, keep
            one's nose to the grindstone, keep one's shoulder to
            the wheel]
       2: walk heavily and firmly, as when weary, or through mud;
          "Mules plodded in a circle around a grindstone" [syn: footslog,
           plod, trudge, pad, tramp]
       3: strike heavily, especially with the fist or a bat; "He
          slugged me so hard that I passed out" [syn: slug, swig]
       [also: slogging, slogged]