A word appearing as ᴱQ. piopin or pipin in the Qenya Lexicon of the 1910s glossed “the fruit of hawthorns, haws”, apparently a combination of ᴱQ. pio “berry” and ᴱ√PINI “✱small” (QL/74). Both piopin and pipin appeared in the contemporaneous Poetic and Mythological Words of Eldarissa with the gloss “haws” (PME/74).
Neo-Quenya: I’d retain ᴺQ. piopin for purposes of Neo-Quenya for the fruit of hawthorns, since there is evidence that ✱√PI(N) “little” survived in Tolkien’s later writing.
A word appearing as pseudo-root ᴱQ. PIO “plum, (berry), cherry” in the Qenya Lexicon of the 1910s, which Tolkien indicated was possibly connected to the early roots ᴱ√PIẆI or ᴱ√PINI (QL/74). Elsewhere in the document Tolkien said pio was a type of fruit “like cherries, plums, etc.” (QL/61). In Early Qenya Word-lists of the 1920s, Tolkien instead had ᴱQ. pie “berry” (PE16/143).
Neo-Quenya: I’d retain ᴺQ. pio for purposes of Neo-Quenya for small fruits with seeds like plums, cherries and berries.