A new gloss for the root ᴹ√YEL “daughter”, with a new set of derivatives like ᴹQ. -iel “-friend” and ᴹQ. yelda “friendly” (Ety/YEL), but it was rejected in turn and probably replaced by ᴹ√MEL.
Middle Primitive Elvish
dil
root. stop up, fill up hole
n(d)il
root. friend; love, devotion
mālō
noun. friend
yel
root. friend
A root in The Etymologies of the 1930s glossed “stop up, fill up hole”, with various Noldorin derivatives of similar meaning (Ety/DIL).