IPA: /ˈʌndərˌwʊd/
KK: /ˈʌndərˌwʊd/
Shrubs and small trees that grow under larger trees in a forest or wooded area.
The forest floor was covered with underwood, providing shelter for small animals.
Underwood is formed from "under" (from Old English "under", meaning beneath or below) and "wood" (from Old English "wudu", meaning forest or wooded area). The word refers to the vegetation or growth that exists beneath the trees in a forest.
Think of something that grows 'beneath' ('under') the trees in a 'wooded area' ('wood') — that's what underwood means.