A Sindarin word for “Wose”, a loan word from the Wose’s name for themselves: Drughu (UT/385).
Conceptual Development: In his Words, Phrases and Passages from the Lord of the Rings from the late 1950s or early 1960s, Tolkien considered making this word a native Sindarin adjective “savage, wild” derived from the root √DROB, a variant of √SROB from which rhaw “wild” was derived (PE17/99). These roots would produce the Q. cognate (h)róva instead of better established Q. (h)ráva “wild”, so I personally prefer the later derivation of Drû as a loan word from Wos. Drughu.
Given as the Quenya word for “Wose” (UT/385), most likely an adaptation of its Sindarin cognate S. Drû.