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
see also:
plug away peg away keep one's nose to the grindstone keep one's shoulder to the wheel footslog plod 
trudge pad tramp slug swig 
slogging slogged 

slogged
     see slog
see also:
slog