A root in The Etymologies of the 1930s glossed “stop” with derivatives like ᴹQ. tampa “stopper” and ᴹQ. tape “he stops, blocks” (Ety/TAP; EtyAC/TAP). The word Q. tapta “impeded” from notes associated with the Quendi and Eldar essay of 1959-60 was probably related (VT39/17), indicating the root’s ongoing validity.
Middle Primitive Elvish
dil
root. stop up, fill up hole
n(d)il
root. friend; love, devotion
mālō
noun. friend
tap
root. stop
yel
root. friend
ñel
root. friendship
A rejected root for “friendship” in The Etymologies of the 1930s (EtyAC/ÑEL), apparently replaced by ᴹ√N(D)IL.
A root in The Etymologies of the 1930s glossed “stop up, fill up hole”, with various Noldorin derivatives of similar meaning (Ety/DIL).