A verb G. drautha- “to weary, tire out” appearing in the Gnomish Lexicon of the 1910s, based directly on the adjective G. drauth “weary, tired” (GL/30). If it were derived from its ancient root, the Gnomish verb would be ✱✱draptha-; compare G. naptha- “seize” < ᴱ√NAPA.
Neo-Sindarin: I’d retain this word as ᴺS. drautha- “to weary, tire out” for purposes of Neo-Sindarin based on the Neo-Root ᴺ√(D)RAP.
@@@ Tolkien’s note that drautha- was formed directly from drauth points to p in root, since this would ordinarily be draptha-