_ n. _door. Q. fenna. >> fennas
Sindarin
fend
noun. door, door; [N.] threshold
fen
noun. door, threshold
fen
door
fend
treshold
fend (door), construct fen, pl. find, coll. pl. fennath
fend
door
(threshold), construct fen, pl. find, coll. pl. fennath, 2) fennas (gateway), pl. fennais, coll. pl. fennassath, 3) annon (great gate), pl. ennyn
fend
treshold
(door), construct fen, pl. find, coll. pl. fennath
annon
noun. great door or gate
fen(n)
noun. door
fennas
noun. doorway, gateway
fennas
doorway
_ n. doorway. fennas nogothrim lasto beth lammen _'doorway of the Dwarf-folk listen to the words of my tongue'. >> fen
A word appearing as fend “door” in notes on the Common Eldarin Article (CEA) from 1969 (PE23/136). In notes from December 1959 (D59), Tolkien gave it as fen “door” derived from the root √PHEN, with a Quenya equivalent as fenna indicating a primitive form of ✱phennā (PE17/181). In The Lord of the Rings proper, it was an element in the name Fen Hollen “Closed Door” (LotR/826; RC/550); perhaps fen is a reduced pseudo-prefixal form of fenn/fend.
Conceptual Development: In The Etymologies of the 1930s Tolkien had N. fenn “threshold” derived from ON. phenda under the root ᴹ√PHEN (Ety/PHEN). In Lord of the Rings drafts from the 1940s it appeared as fenn in Fenn Forn(en) and similar variants, all earlier names for Fen Hollen (WR/341).
Neo-Sindarin: I don’t think the senses “door” and “threshold” are likely to coexist, and for purposes of Neo-Sindarin I would limit fend to “door”.