"slog" in the verb sense
1. plug away, peg away, slog, keep one's nose to the grindstone, keep one's shoulder to the wheel
work doggedly or persistently
"She keeps plugging away at her dissertation"
2. slog, footslog, plod, trudge, pad, tramp
walk heavily and firmly, as when weary, or through mud
"Mules plodded in a circle around a grindstone"
3. slug, slog, swig
strike heavily, especially with the fist or a bat
"He slugged me so hard that I passed out"
Source: WordNet® (An amazing lexical database of English)
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