DCHP-1 Online
underbrushing 
n. the action or process of removing underbrush, as in clearing land.
- 1853 As soon as the underbrushing was finished, I hired another man and commenced cutting out a sleigh road to Peterborough.
- 1863 A man in a red shirt, who was engaged in underbrushing at a little distance, said that " the town " was only a mile away . . . .
- 1933 That process . . . called "underbrushing," was continued over a space about twenty yards wide, up the steep bank of the creek to the high level land.
- 1853 As soon as the underbrushing was finished, I hired another man and commenced cutting out a sleigh road to Peterborough.