Early Quenya
pi(o)pin
noun. haws, fruit of hawthorns
pi(pi)nektar
noun. whitethorn, hawthorn
pí
noun. speck, spot, dot, mote
-pin(ke)
suffix. diminutive
-pi(t)
suffix. diminutive
-lla
suffix. diminutive
-(l)inta
suffix. diminutive
-(w)inta
suffix. diminutive
-inya
suffix. diminutive
-itsa
suffix. diminutive
-itse
suffix. diminutive
-linte
suffix. diminutive
-litse
suffix. diminutive
-lle
suffix. diminutive
-tsa
suffix. diminutive
-íne(a)
suffix. diminutive
mi(e)-
prefix. diminutive
mike-
prefix. diminutive
miki-
prefix. diminutive
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.