A word for “thorn” in notes on the Words, Phrases and Passages from the Lord of the Rings (WPP) from the late 1950s or early 1960s, derived from the root √NEK having to do with angles (PE17/55).
Quenya
necel
thorn
necel
noun. thorn
nassë
thorn, spike
nassë (2) noun "thorn, spike" (NAS). Not to be confused with nassë "(s)he is", VT49:30 or nassë # above. Note that in late material, the unambiguous word necel appears for "thorn" (PE17:55).
necel ("k") noun "thorn" (PE17:55)