I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: under (III) + brush
1. : shrubs, bushes, or small trees growing beneath large trees in a wood or forest : brush
2. : a tangled, obstructing, or impeding mass
heavy underbrush of footnotes to impede the general reader — Owen Lattimore
II. transitive verb
: to clear of underbrush
intransitive verb
: to cut or clear away underbrush