The word G. dod “berry” appeared in the Gnomish Lexicon of the 1910s above G. dod- “fall down, drop” (GL/30), so perhaps originally meaning “*a thing dropped”.

Neo-Sindarin: I would retain ᴺS. dod “berry” for purposes of Neo-Sindarin as a derivative of the Neo-Root ᴺ√DOT “drop”.