underbrush
UK: ˈʌndəbrʌʃ | US: ˈʌndərbrʌʃ
n. dense vegetation growing beneath trees in a forest, consisting of shrubs, small trees, and other plants
The word "underbrush" combines "under" (from Old English under, meaning "beneath") and "brush" (from Middle French broce, meaning "thicket" or "shrubbery"). It emerged in the early 19th century to describe the dense lower layer of vegetation in forests, logically extending the idea of "brush" (shrubs) growing "under" taller trees. The term reflects a practical, descriptive approach to naming natural features.
The hikers struggled to push through the thick underbrush.
Deer often hide in the underbrush to avoid predators.
The forest fire spread quickly due to the dry underbrush.
Clearing the underbrush made the trail more accessible.
Birds nested in the underbrush, sheltered from the wind.